diff --git a/libpsx/include/psxgpu.h b/libpsx/include/psxgpu.h
index 174569c..53c53d9 100644
--- a/libpsx/include/psxgpu.h
+++ b/libpsx/include/psxgpu.h
@@ -525,7 +525,7 @@ enum psx_gpu_texmodes
 /**
  * Macro to specify texture color mode, takes a value from psx_gpu_texmodes
  */
-#define COLORMODE(x)		x&3
+#define COLORMODE(x)		((x) & 3)
 /**
  * Macro to specify translucency/semitransparency mode, where x can be a value from 0 to 3.
  *