diff --git a/compiler.pri b/compiler.pri
index 701916f5e..aa1e5b7fe 100644
--- a/compiler.pri
+++ b/compiler.pri
@@ -45,7 +45,7 @@ win32 {
 		QMAKE_LINK = /opt/gcc/bin/g++
 	}
 
-	QMAKE_CFLAGS *= -Wshadow -Woverloaded-virtual -Wold-style-cast -Wconversion -Wsign-compare -fvisibility=hidden
+	QMAKE_CFLAGS *= -Wshadow -Wconversion -Wsign-compare -fvisibility=hidden
 	QMAKE_CXXFLAGS *= -Wshadow -Woverloaded-virtual -Wold-style-cast -Wconversion -Wsign-compare -fvisibility=hidden
 	!macx {
 		QMAKE_LFLAGS *= -Wl,--as-needed