diff --git a/src/mame/video/hd63484.c b/src/mame/video/hd63484.c
index ec8d9105973..dc0b2aba37d 100644
--- a/src/mame/video/hd63484.c
+++ b/src/mame/video/hd63484.c
@@ -9,7 +9,7 @@ this chip is used in:
 ***************************************************************************/
 
 #include "driver.h"
-#include "math.h"
+#include <math.h>
 #include "video/hd63484.h"
 
 #define LOG_COMMANDS 0