diff --git a/dwarves.h b/dwarves.h
index ebb4b16..cf49f49 100644
--- a/dwarves.h
+++ b/dwarves.h
@@ -1089,7 +1089,6 @@ struct class_member *type__last_member(struct type *type);
 
 const char *enumeration__prefix(struct type *type, const struct cu *cu);
 uint16_t enumeration__prefix_len(struct type *type, const struct cu *cu);
-int enumeration__max_entry_name_len(struct type *type);
 
 void enumerations__calc_prefix(struct list_head *enumerations);
 
diff --git a/dwarves_fprintf.c b/dwarves_fprintf.c
index ed45fa1..e9fb3d5 100644
--- a/dwarves_fprintf.c
+++ b/dwarves_fprintf.c
@@ -362,7 +362,7 @@ static size_t imported_module__fprintf(const struct tag *tag,
 	return fprintf(fp, "using namespace %s", name);
 }
 
-int enumeration__max_entry_name_len(struct type *type)
+static int enumeration__max_entry_name_len(struct type *type)
 {
 	if (type->max_tag_name_len)
 		goto out;