diff --git a/qt/cflags_windows.go b/qt/cflags_windows.go
index 9be4537..696a761 100644
--- a/qt/cflags_windows.go
+++ b/qt/cflags_windows.go
@@ -2,6 +2,7 @@ package qt
 
 /*
 #cgo CXXFLAGS: -std=c++11
+#cgo CFLAGS: -std=gnu11
 #cgo pkg-config: Qt5Widgets
 */
 import "C"