diff --git a/lib/checktype.cpp b/lib/checktype.cpp
index 1fde04836..e3e0db947 100644
--- a/lib/checktype.cpp
+++ b/lib/checktype.cpp
@@ -315,7 +315,9 @@ void CheckType::checkLongCast()
     for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
         if (!Token::Match(tok, "%var% ="))
             continue;
-        if (!tok->variable() || !tok->variable()->isConst() || tok->variable()->typeStartToken()->originalName() != "long")
+        if (!tok->variable() || !tok->variable()->isConst() || tok->variable()->typeStartToken()->str() != "long")
+            continue;
+        if (!tok->variable()->typeStartToken()->originalName().empty())
             continue;
         if (Token::Match(tok->next()->astOperand2(), "*|<<") && astIsIntResult(tok->next()->astOperand2()))
             longCastAssignError(tok);
@@ -331,7 +333,7 @@ void CheckType::checkLongCast()
         const Token * def = scope->classDef;
         bool islong = false;
         while (Token::Match(def, "%type%|::")) {
-            if (def->originalName() == "long") {
+            if (def->str() == "long" && def->originalName().empty()) {
                 islong = true;
                 break;
             }
diff --git a/test/testtype.cpp b/test/testtype.cpp
index c4f1b2878..5acc7795d 100644
--- a/test/testtype.cpp
+++ b/test/testtype.cpp
@@ -140,6 +140,7 @@ private:
     void longCastAssign() {
         Settings settings;
         settings.addEnabled("style");
+        settings.platform(Settings::PlatformType::Unix64);
 
         check("long f(int x, int y) {\n"
               "  const long ret = x * y;\n"
@@ -147,6 +148,13 @@ private:
               "}\n", &settings);
         ASSERT_EQUALS("[test.cpp:2]: (style) possible loss of information, int result is assigned to long variable\n", errout.str());
 
+        // typedef
+        check("long f(int x, int y) {\n"
+              "  const size_t ret = x * y;\n"
+              "  return ret;\n"
+              "}\n", &settings);
+        ASSERT_EQUALS("", errout.str());
+
         // astIsIntResult
         check("long f(int x, int y) {\n"
               "  const long ret = (long)x * y;\n"
@@ -163,6 +171,12 @@ private:
               "  return x * y;\n"
               "}\n", &settings);
         ASSERT_EQUALS("[test.cpp:2]: (style) possible loss of information, int result is returned as long value\n", errout.str());
+
+        // typedef
+        check("size_t f(int x, int y) {\n"
+              "  return x * y;\n"
+              "}\n", &settings);
+        ASSERT_EQUALS("", errout.str());
     }
 };