diff --git a/src/mess/machine/gb.c b/src/mess/machine/gb.c
index e39b489d9e6..2160cacaa53 100644
--- a/src/mess/machine/gb.c
+++ b/src/mess/machine/gb.c
@@ -359,7 +359,7 @@ WRITE8_MEMBER(gb_state::gb_io2_w)
 }
 
 #ifdef MAME_DEBUG
-static const char *const sgbcmds[26] =
+static const char *const sgbcmds[32] =
 {
 	"PAL01   ",
 	"PAL23   ",
@@ -387,6 +387,12 @@ static const char *const sgbcmds[26] =
 	"MASK_EN ",
 	"OBJ_TRN ",
 	"????????",
+	"????????",
+	"????????",
+	"????????",
+	"????????",
+	"????????",
+	"????????"
 };
 #endif