diff --git a/src/defs.h b/src/defs.h
index 24182cd..6d056cc 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -49,7 +49,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #define MAX_MOUSE_BUTTONS	6
 
 #define FPS				60
-#define LOGIC_RATE		(1000 / FPS)
+#define LOGIC_RATE		(1000.0 / FPS)
 
 #define TEXT_TTL		(1000 * 20)