diff --git a/src/config.h b/src/config.h
index 2ce6b98..da70884 100644
--- a/src/config.h
+++ b/src/config.h
@@ -5,6 +5,7 @@
 #define USB_FEATURE 0
 #define DEBUGMODE 0
 
+#include <gint/display.h>
 
 /* Enable GrayMode on either FX and FX_G3A targets */
 #if GINT_RENDER_MONO && defined(COLOR2BIT)
@@ -14,6 +15,7 @@
 
 
 #if GINT_RENDER_RGB
+    #warning "Ok!"
     #define T_HEIGHT 16
     #define T_WIDTH  16
     #define PXSIZE   2
@@ -21,6 +23,7 @@
     #define P_WIDTH 16
     #define P_HEIGHT 16
 #else
+    #warning "Bad!"
     #define T_HEIGHT 8
     #define T_WIDTH  8
     #define PXSIZE   1
@@ -32,7 +35,7 @@
 
 /* SPEED should NOT be 8 or bigger: it may cause bugs when handling
  * collisions! */
-#define SPEED PXSIZE*2
+#define SPEED (PXSIZE*2)
 
 
 #define F_WIDTH (32*PXSIZE)