diff --git a/src/emu/model_evspec.c b/src/emu/model_evspec.c
index 6b67cb6..23fd12a 100644
--- a/src/emu/model_evspec.c
+++ b/src/emu/model_evspec.c
@@ -64,7 +64,7 @@ model_evspec_init(struct model_evspec *evspec, struct model_spec *spec)
 }
 
 struct ev_spec *
-model_evspec_find(struct model_evspec *evspec, char mcv[4])
+model_evspec_find(struct model_evspec *evspec, char *mcv)
 {
 	struct ev_spec *s = NULL;
 	HASH_FIND_STR(evspec->spec, mcv, s);
diff --git a/src/emu/model_evspec.h b/src/emu/model_evspec.h
index d775a1c..efa0657 100644
--- a/src/emu/model_evspec.h
+++ b/src/emu/model_evspec.h
@@ -19,6 +19,6 @@ struct model_evspec {
 };
 
 USE_RET int model_evspec_init(struct model_evspec *evspec, struct model_spec *spec);
-USE_RET struct ev_spec *model_evspec_find(struct model_evspec *evspec, char mcv[4]);
+USE_RET struct ev_spec *model_evspec_find(struct model_evspec *evspec, char *mcv);
 
 #endif /* MODEL_EVSPEC_H */