diff --git a/config.h b/config.h
index 5cfb12b..471e496 100644
--- a/config.h
+++ b/config.h
@@ -11,12 +11,7 @@
 #define FS_BUTTON     SDLK_f
 #define PAUSE_BUTTON  SDLK_q
 
-
-// internal game resolution is 320x180 widescreen
-#define SCREEN_WIDTH 320
-#define SCREEN_HEIGHT 180
-
-// video scaling factor should be a positive integer
+/* video scaling factor should be a positive integer */
 #define SCALE_FACTOR 2
 
 //#define SOUND_ON
diff --git a/extern.h b/extern.h
index a72e8ac..633ae9c 100644
--- a/extern.h
+++ b/extern.h
@@ -1,4 +1,10 @@
 
+enum screenDimensions
+{
+  SCREEN_WIDTH = 320,
+  SCREEN_HEIGHT = 180
+};
+
 extern int fullscreen;
 extern int quit;
 extern int playing;