diff --git a/common.pri b/common.pri
index 51713f3cbe..fe4a303a7c 100644
--- a/common.pri
+++ b/common.pri
@@ -102,7 +102,8 @@ win32-msvc2010 {
 }
 
 unix|win32-g++ {
-  QMAKE_CXXFLAGS_WARN_ON += -Wno-sign-compare -Wno-strict-aliasing -Wno-unused-parameter
+  QMAKE_CXXFLAGS_WARN_ON += -Wno-sign-compare -Wno-strict-aliasing -Wno-unused-parameter \
+      -Werror=return-type
   !*-g++* {
     QMAKE_CXXFLAGS_WARN_ON += -Wno-sign-conversion
   }