diff --git a/src/wpc/core.h b/src/wpc/core.h
index 6411c38dc..2225a0e21 100644
--- a/src/wpc/core.h
+++ b/src/wpc/core.h
@@ -306,7 +306,7 @@ extern void video_update_core_dmd(struct mame_bitmap *bitmap, const struct recta
 #define CORE_FLIPPERSWCOL                11 /* internal array number */
 #define CORE_STDSWCOLS                   12 /* Base number of switch matrix columns */
 #define CORE_CUSTSWCOL       CORE_STDSWCOLS /* first custom (game specific) switch column */
-#define CORE_MAXLAMPCOL                  72 /* lamp column (0-7=std lamp matrix 8- custom) */
+#define CORE_MAXLAMPCOL                  78 /* lamp column (0-7=std lamp matrix 8- custom) */
 #define CORE_STDLAMPCOLS                  8 /* Base number of lamp matrix columns */
 #define CORE_CUSTLAMPCOL   CORE_STDLAMPCOLS /* first custom lamp column */
 #define CORE_MAXPORTS                     8 /* Maximum input ports */