diff --git a/UI/EmuScreen.cpp b/UI/EmuScreen.cpp
index 967f7d7f6..0122b9453 100644
--- a/UI/EmuScreen.cpp
+++ b/UI/EmuScreen.cpp
@@ -70,8 +70,8 @@
 #include "Windows/MainWindow.h"
 #endif
 
-bool frameStep_;
-int lastNumFlips;
+static bool frameStep_;
+static int lastNumFlips;
 
 static void __EmuScreenVblank()
 {