diff --git a/src/mame/drivers/peplus.cpp b/src/mame/drivers/peplus.cpp
index 45112286ebe..a244cb37163 100644
--- a/src/mame/drivers/peplus.cpp
+++ b/src/mame/drivers/peplus.cpp
@@ -203,6 +203,7 @@ A Note about Best Bet Products.
 #include "machine/nvram.h"
 #include "sound/ay8910.h"
 #include "video/mc6845.h"
+#include "emupal.h"
 #include "screen.h"
 #include "speaker.h"