1 files changed, 1 insertions, 1 deletions
diff --git a/ast.h b/ast.h
index a886c2e..11fdf04 100644
--- a/ast.h
+++ b/ast.h
@@ -60,7 +60,7 @@ typedef struct CNode {
 
 CNode *cnode_add_loc(CNode *node, YYLTYPE loc);
 CNode *cnode_create_ast(CNode *wrapped);
-CNode *cnode_create_nop();
+CNode *cnode_create_nop(void);
 CNode *cnode_create_general(int type, int subtype, int pnum, va_list ap);
 CNode *cnode_list_append(CNode *list, CNode *tail);
 CNode *cnode_list_wrap(int type, CNode *list);