diff --git a/src/plugins/coreplugin/macfullscreen.mm b/src/plugins/coreplugin/macfullscreen.mm
index f9652ae0707..3392328e87c 100644
--- a/src/plugins/coreplugin/macfullscreen.mm
+++ b/src/plugins/coreplugin/macfullscreen.mm
@@ -37,8 +37,9 @@
 #include <Foundation/NSNotification.h>
 
 #include <QSysInfo>
+#include <qglobal.h>
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
+#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_6
 enum {
     NSWindowCollectionBehaviorFullScreenPrimary = (1 << 7)
 };