diff --git a/src/emu/cpu/m37710/m37710.h b/src/emu/cpu/m37710/m37710.h
index da5d822113d..0f659e7acac 100644
--- a/src/emu/cpu/m37710/m37710.h
+++ b/src/emu/cpu/m37710/m37710.h
@@ -86,7 +86,7 @@ enum
 
 // internal ROM region
 #define M37710_INTERNAL_ROM_REGION "internal"
-#define M37710_INTERNAL_ROM(_tag) (_tag ":" M33710_INTERNAL_ROM_REGION)
+#define M37710_INTERNAL_ROM(_tag) (_tag ":" M37710_INTERNAL_ROM_REGION)
 
 class m37710_cpu_device : public cpu_device
 {