diff --git a/gui/csvreport.cpp b/gui/csvreport.cpp
index 0080f1434..1147d01f3 100644
--- a/gui/csvreport.cpp
+++ b/gui/csvreport.cpp
@@ -65,7 +65,7 @@ void CsvReport::WriteError(const ErrorItem &error)
     QString line;
     const QString file = QDir::toNativeSeparators(error.files[error.files.size() - 1]);
     line += QString("%1,%2,").arg(file).arg(error.lines[error.lines.size() - 1]);
-    line += QString("%1,%2").arg(error.severity).arg(error.summary);
+    line += QString("%1,%2").arg(GuiSeverity::toString(error.severity)).arg(error.summary);
 
     mTxtWriter << line << endl;
 }
diff --git a/gui/erroritem.cpp b/gui/erroritem.cpp
index a7b09c853..dd7fc1aa9 100644
--- a/gui/erroritem.cpp
+++ b/gui/erroritem.cpp
@@ -35,14 +35,14 @@ ErrorItem::ErrorItem(const ErrorLine &line)
     files.append(line.file);
     lines.append(line.line);
     id = line.id;
-    severity = line.severity;
+    severity = GuiSeverity::fromString(line.severity);
     summary = line.summary;
     message = line.message;
 }
 
 QString ErrorItem::ToString() const
 {
-    QString str = file + " - " + id + " - " + severity +"\n";
+    QString str = file + " - " + id + " - " + GuiSeverity::toString(severity) +"\n";
     str += summary + "\n";
     str += message + "\n";
     for (int i = 0; i < files.size(); i++)
diff --git a/gui/erroritem.h b/gui/erroritem.h
index c6b36b7c3..8092c5f46 100644
--- a/gui/erroritem.h
+++ b/gui/erroritem.h
@@ -22,12 +22,70 @@
 #include <QString>
 #include <QStringList>
 #include <QMetaType>
+#include "errorlogger.h"
 
 class ErrorLine;
 
 /// @addtogroup GUI
 /// @{
 
+
+/**
+ * @brief GUI versions of severity conversions.
+ * GUI needs its own versions of conversions since GUI uses Qt's QString
+ * instead of the std::string used by lib/cli.
+ */
+class GuiSeverity : Severity
+{
+public:
+    static QString toString(SeverityType severity)
+    {
+        switch (severity)
+        {
+        case none:
+            return "";
+        case error:
+            return "error";
+        case warning:
+            return "warning";
+        case style:
+            return "style";
+        case performance:
+            return "performance";
+        case portability:
+            return "portability";
+        case information:
+            return "information";
+        case debug:
+            return "debug";
+        };
+        return "???";
+    }
+
+    static SeverityType fromString(const QString &severity)
+    {
+        if (severity.isEmpty())
+            return none;
+        if (severity == "none")
+            return none;
+        if (severity == "error")
+            return error;
+        if (severity == "warning")
+            return warning;
+        if (severity == "style")
+            return style;
+        if (severity == "performance")
+            return performance;
+        if (severity == "portability")
+            return portability;
+        if (severity == "information")
+            return information;
+        if (severity == "debug")
+            return debug;
+        return none;
+    }
+};
+
 /**
 * @brief A class containing error data for one error.
 *
@@ -54,7 +112,7 @@ public:
     QStringList files;
     QList<unsigned int> lines;
     QString id;
-    QString severity;
+    Severity::SeverityType severity;
     QString summary;
     QString message;
 };
diff --git a/gui/resultstree.cpp b/gui/resultstree.cpp
index 5f2630c53..59b6bfc23 100644
--- a/gui/resultstree.cpp
+++ b/gui/resultstree.cpp
@@ -109,7 +109,7 @@ void ResultsTree::AddErrorItem(const ErrorItem &item)
         realfile = tr("Undefined file");
     }
 
-    bool hide = !mShowTypes[SeverityToShowType(item.severity)];
+    bool hide = !mShowTypes[SeverityToShowType(GuiSeverity::toString(item.severity))];
 
     //if there is at least one error that is not hidden, we have a visible error
     if (!hide)
@@ -123,7 +123,7 @@ void ResultsTree::AddErrorItem(const ErrorItem &item)
     line.line = item.lines[0];
     line.summary = item.summary;
     line.message = item.message;
-    line.severity = item.severity;
+    line.severity = GuiSeverity::toString(item.severity);
     //Create the base item for the error and ensure it has a proper
     //file item as a parent
     QStandardItem *stditem = AddBacktraceFiles(EnsureFileItem(line.file, hide),
@@ -137,7 +137,7 @@ void ResultsTree::AddErrorItem(const ErrorItem &item)
     //Add user data to that item
     QMap<QString, QVariant> data;
     data["hide"] = false;
-    data["severity"]  = SeverityToShowType(item.severity);
+    data["severity"]  = SeverityToShowType(GuiSeverity::toString(item.severity));
     data["summary"] = item.summary;
     data["message"]  = item.message;
     data["file"]  = item.files[0];
@@ -794,7 +794,7 @@ void ResultsTree::SaveErrors(Report *report, QStandardItem *item)
         QVariantMap data = userdata.toMap();
 
         ErrorItem item;
-        item.severity = ShowTypeToString(VariantToShowType(data["severity"]));
+        item.severity = GuiSeverity::fromString(ShowTypeToString(VariantToShowType(data["severity"])));
         item.summary = data["summary"].toString();
         item.message = data["message"].toString();
         item.id = data["id"].toString();
diff --git a/gui/resultsview.cpp b/gui/resultsview.cpp
index 1d4f90568..13bf85348 100644
--- a/gui/resultsview.cpp
+++ b/gui/resultsview.cpp
@@ -88,7 +88,7 @@ void ResultsView::Error(const ErrorItem &item)
     mErrorsFound = true;
     mUI.mTree->AddErrorItem(item);
     emit GotResults();
-    mStatistics->AddItem(ResultsTree::SeverityToShowType(item.severity));
+    mStatistics->AddItem(ResultsTree::SeverityToShowType(GuiSeverity::toString(item.severity)));
 }
 
 void ResultsView::ShowResults(ShowTypes type, bool show)
diff --git a/gui/threadresult.cpp b/gui/threadresult.cpp
index 7a92481c4..38e990ba1 100644
--- a/gui/threadresult.cpp
+++ b/gui/threadresult.cpp
@@ -71,7 +71,7 @@ void ThreadResult::reportErr(const ErrorLogger::ErrorMessage &msg)
     item.lines = lines;
     item.summary = QString::fromStdString(msg.shortMessage());
     item.message = QString::fromStdString(msg.verboseMessage());
-    item.severity = QString::fromStdString(Severity::toString(msg._severity));
+    item.severity = msg._severity;
 
     if (msg._severity != Severity::debug)
         emit Error(item);
diff --git a/gui/txtreport.cpp b/gui/txtreport.cpp
index 20c34d7b7..f7c5ceb86 100644
--- a/gui/txtreport.cpp
+++ b/gui/txtreport.cpp
@@ -76,7 +76,7 @@ void TxtReport::WriteError(const ErrorItem &error)
         }
     }
 
-    line += QString("(%1) %2").arg(error.severity).arg(error.summary);
+    line += QString("(%1) %2").arg(GuiSeverity::toString(error.severity)).arg(error.summary);
 
     mTxtWriter << line << endl;
 }
diff --git a/gui/xmlreportv1.cpp b/gui/xmlreportv1.cpp
index 1062de07f..bab621f81 100644
--- a/gui/xmlreportv1.cpp
+++ b/gui/xmlreportv1.cpp
@@ -100,7 +100,9 @@ void XmlReportV1::WriteError(const ErrorItem &error)
     const QString line = QString::number(error.lines[error.lines.size() - 1]);
     mXmlWriter->writeAttribute(LineAttribute, line);
     mXmlWriter->writeAttribute(IdAttribute, error.id);
-    mXmlWriter->writeAttribute(SeverityAttribute, error.severity);
+
+    // Don't localize severity so we can read these files
+    mXmlWriter->writeAttribute(SeverityAttribute, GuiSeverity::toString(error.severity));
     const QString message = XmlReport::quoteMessage(error.message);
     mXmlWriter->writeAttribute(MsgAttribute, message);
     mXmlWriter->writeEndElement();
@@ -165,7 +167,7 @@ ErrorItem XmlReportV1::ReadError(QXmlStreamReader *reader)
         const int line = attribs.value("", LineAttribute).toString().toUInt();
         item.lines.push_back(line);
         item.id = attribs.value("", IdAttribute).toString();
-        item.severity = attribs.value("", SeverityAttribute).toString();
+        item.severity = GuiSeverity::fromString(attribs.value("", SeverityAttribute).toString());
 
         // NOTE: This dublicates the message to Summary-field. But since
         // old XML format doesn't have separate summary and verbose messages
diff --git a/gui/xmlreportv2.cpp b/gui/xmlreportv2.cpp
index 381d7d9c0..2c5665704 100644
--- a/gui/xmlreportv2.cpp
+++ b/gui/xmlreportv2.cpp
@@ -110,7 +110,9 @@ void XmlReportV2::WriteError(const ErrorItem &error)
 
     mXmlWriter->writeStartElement(ErrorElementName);
     mXmlWriter->writeAttribute(IdAttribute, error.id);
-    mXmlWriter->writeAttribute(SeverityAttribute, error.severity);
+
+    // Don't localize severity so we can read these files
+    mXmlWriter->writeAttribute(SeverityAttribute, GuiSeverity::toString(error.severity));
     const QString summary = XmlReport::quoteMessage(error.summary);
     mXmlWriter->writeAttribute(MsgAttribute, summary);
     const QString message = XmlReport::quoteMessage(error.message);
@@ -196,7 +198,7 @@ ErrorItem XmlReportV2::ReadError(QXmlStreamReader *reader)
     {
         QXmlStreamAttributes attribs = reader->attributes();
         item.id = attribs.value("", IdAttribute).toString();
-        item.severity = attribs.value("", SeverityAttribute).toString();
+        item.severity = GuiSeverity::fromString(attribs.value("", SeverityAttribute).toString());
         const QString summary = attribs.value("", MsgAttribute).toString();
         item.summary = XmlReport::unquoteMessage(summary);
         const QString message = attribs.value("", VerboseAttribute).toString();