diff --git a/src/libs/3rdparty/cplusplus/Bind.cpp b/src/libs/3rdparty/cplusplus/Bind.cpp
index e5802d44283..d8f9861e7d2 100644
--- a/src/libs/3rdparty/cplusplus/Bind.cpp
+++ b/src/libs/3rdparty/cplusplus/Bind.cpp
@@ -468,7 +468,10 @@ bool isInteger(const StringLiteral *stringLiteral)
 {
     const int size = stringLiteral->size();
     const char *chars = stringLiteral->chars();
-    for (int i = 0; i < size; ++i) {
+    int i = 0;
+    if (chars[i] == '-')
+        ++i;
+    for (; i < size; ++i) {
         if (!isdigit(chars[i]))
             return false;
     }
diff --git a/tests/auto/cplusplus/semantic/tst_semantic.cpp b/tests/auto/cplusplus/semantic/tst_semantic.cpp
index 2011f03e002..9fed8689c95 100644
--- a/tests/auto/cplusplus/semantic/tst_semantic.cpp
+++ b/tests/auto/cplusplus/semantic/tst_semantic.cpp
@@ -190,6 +190,7 @@ private slots:
     void enum_constantValue3();
     void enum_constantValue4();
     void enum_constantValue5();
+    void enum_constantValueNegative();
 };
 
 void tst_Semantic::function_declaration_1()
@@ -916,5 +917,28 @@ void tst_Semantic::enum_constantValue5()
     testEnumaratorDeclarator(e, 4, "2");
 }
 
+void tst_Semantic::enum_constantValueNegative()
+{
+    QSharedPointer<Document> doc = document(
+                "enum {\n"
+                "  E1=-2,\n"
+                "  E2,\n"
+                "  E3,\n"
+                "  E4\n"
+                "};\n"
+    );
+
+    QCOMPARE(doc->errorCount, 0U);
+    QCOMPARE(doc->globals->memberCount(), 1U);
+    Enum *e = doc->globals->memberAt(0)->asEnum();
+    QVERIFY(e);
+    QCOMPARE(e->memberCount(), 4U);
+
+    testEnumaratorDeclarator(e, 0, "-2");
+    testEnumaratorDeclarator(e, 1, "-1");
+    testEnumaratorDeclarator(e, 2, "0");
+    testEnumaratorDeclarator(e, 3, "1");
+}
+
 QTEST_MAIN(tst_Semantic)
 #include "tst_semantic.moc"