diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index ff7c8dfc282..af32811d348 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -843,6 +843,7 @@ template <QPixelLayout::BPP bpp> static
 uint QT_FASTCALL fetchPixel(const uchar *, int)
 {
     Q_UNREACHABLE();
+    return 0;
 }
 
 template <>