1 files changed, 4 insertions, 0 deletions
diff --git a/parse.y b/parse.y
index 94505c7989..08c0323724 100644
--- a/parse.y
+++ b/parse.y
@@ -5891,6 +5891,10 @@ int
 ruby_parser_stack_on_heap()
 {
 #if defined(YYMALLOC)
+    (void)rb_parser_realloc;
+    (void)rb_parser_calloc;
+    (void)nodetype;
+    (void)nodeline;
     return Qfalse;
 #else
     return Qtrue;