1 files changed, 2 insertions, 1 deletions
diff --git a/array.c b/array.c
index 68cbb6bfe3..f79a79c784 100644
--- a/array.c
+++ b/array.c
@@ -2510,7 +2510,8 @@ ary_make_hash(VALUE ary1, VALUE ary2)
 static VALUE
 rb_ary_diff(VALUE ary1, VALUE ary2)
 {
-    VALUE ary3, hash;
+    VALUE ary3;
+    volatile VALUE hash;
     long i;
 
     hash = ary_make_hash(to_ary(ary2), 0);