diff --git a/src/libs/cplusplus/pp-engine.cpp b/src/libs/cplusplus/pp-engine.cpp
index 5f2e543c52e..3ef5e2c38e0 100644
--- a/src/libs/cplusplus/pp-engine.cpp
+++ b/src/libs/cplusplus/pp-engine.cpp
@@ -99,7 +99,7 @@ static bool isQtReservedWord(const char *name, int size)
             size -= 2;
             switch (size) {
             case 1:
-                return name[2] == 'D' || name[2] == 'Q';
+                return name[0] == 'D' || name[0] == 'Q';
             case 4:
                 return same(name, "SLOT", size) || same(name, "EMIT", size);
             case 5: