diff --git a/lib/astutils.cpp b/lib/astutils.cpp
index 9b91cd97c..1974caa4a 100644
--- a/lib/astutils.cpp
+++ b/lib/astutils.cpp
@@ -149,6 +149,14 @@ bool isSameExpression(bool cpp, bool macro, const Token *tok1, const Token *tok2
     }
     if (macro && (tok1->isExpandedMacro() || tok2->isExpandedMacro()))
         return false;
+    if (tok1->isComplex() != tok2->isComplex())
+        return false;
+    if (tok1->isLong() != tok2->isLong())
+        return false;
+    if (tok1->isUnsigned() != tok2->isUnsigned())
+        return false;
+    if (tok1->isSigned() != tok2->isSigned())
+        return false;
     if (tok1->isName() && tok1->next()->str() == "(" && tok1->str() != "sizeof") {
         if (!tok1->function() && !Token::Match(tok1->previous(), ".|::") && pure && !library.isFunctionConst(tok1->str(), true) && !tok1->isAttributeConst() && !tok1->isAttributePure())
             return false;
diff --git a/test/testcondition.cpp b/test/testcondition.cpp
index 32292ab7f..225eb37d7 100644
--- a/test/testcondition.cpp
+++ b/test/testcondition.cpp
@@ -564,6 +564,12 @@ private:
               "  else if (x == 40) {}\n"
               "}");
         ASSERT_EQUALS("[test.cpp:3]: (style) Expression is always false because 'else if' condition matches previous condition at line 2.\n", errout.str());
+
+        check("void f(int x) {\n"
+              "  if (x == sizeof(double)) {}\n"
+              "  else { if (x == sizeof(long double)) {} }"
+              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void checkBadBitmaskCheck() {