diff --git a/gui/projectfile.cpp b/gui/projectfile.cpp
index fce386ee8..60872dac3 100644
--- a/gui/projectfile.cpp
+++ b/gui/projectfile.cpp
@@ -719,6 +719,11 @@ void ProjectFile::setSuppressions(const QList<Suppressions::Suppression> &suppre
     mSuppressions = suppressions;
 }
 
+void ProjectFile::addSuppression(const Suppressions::Suppression &suppression)
+{
+    mSuppressions.append(suppression);
+}
+
 void ProjectFile::setAddons(const QStringList &addons)
 {
     mAddons = addons;
@@ -1027,13 +1032,3 @@ QString ProjectFile::getAddonFilePath(QString filesDir, const QString &addon)
 
     return QString();
 }
-
-void ProjectFile::suppressCppcheckId(std::size_t cppcheckId)
-{
-    if (cppcheckId > 0) {
-        Suppressions::Suppression s;
-        s.cppcheckId = cppcheckId;
-        mSuppressions.append(s);
-        write();
-    }
-}
diff --git a/gui/projectfile.h b/gui/projectfile.h
index fc1effc00..1a92f994e 100644
--- a/gui/projectfile.h
+++ b/gui/projectfile.h
@@ -55,9 +55,6 @@ public:
         mActiveProject = this;
     }
 
-    /** Suppress warning with Cppcheck-ID */
-    void suppressCppcheckId(std::size_t cppcheckId);
-
     /**
      * @brief Read the project file.
      * @param filename Filename (can be also given to constructor).
@@ -312,6 +309,9 @@ public:
      */
     void setSuppressions(const QList<Suppressions::Suppression> &suppressions);
 
+    /** Add suppression */
+    void addSuppression(const Suppressions::Suppression &suppression);
+
     /**
      * @brief Set list of addons.
      * @param addons List of addons.
diff --git a/gui/resultstree.cpp b/gui/resultstree.cpp
index a9202bde0..27274c176 100644
--- a/gui/resultstree.cpp
+++ b/gui/resultstree.cpp
@@ -1059,16 +1059,27 @@ void ResultsTree::suppressCppcheckID()
         selectedWarnings.insert(item);
     }
 
+    bool changed = false;
     ProjectFile *projectFile = ProjectFile::getActiveProject();
     for (QStandardItem *item: selectedWarnings) {
         QStandardItem *fileItem = item->parent();
         const QVariantMap data = item->data().toMap();
-        if (projectFile && data.contains("cppcheckId"))
-            projectFile->suppressCppcheckId(data["cppcheckId"].toULongLong());
+        if (projectFile && data.contains("cppcheckId")) {
+            Suppressions::Suppression suppression;
+            suppression.cppcheckId = data["cppcheckId"].toULongLong();
+            suppression.errorId = data["id"].toString().toStdString();
+            suppression.fileName = data["file"].toString().toStdString();
+            suppression.lineNumber = data["line"].toInt();
+            projectFile->addSuppression(suppression);
+            changed = true;
+        }
         fileItem->removeRow(item->row());
         if (fileItem->rowCount() == 0)
             mModel.removeRow(fileItem->row());
     }
+
+    if (changed)
+        projectFile->write();
 }
 
 void ResultsTree::openContainingFolder()