1 files changed, 3 insertions, 2 deletions
diff --git a/array.c b/array.c
index b04fa83780..8752c2deef 100644
--- a/array.c
+++ b/array.c
@@ -1301,11 +1301,12 @@ rb_ary_hash(ary)
     VALUE ary;
 {
     long i;
-    int h;
+    int n, h;
 
     h = RARRAY(ary)->len;
     for (i=0; i<RARRAY(ary)->len; i++) {
-	int n = rb_hash(RARRAY(ary)->ptr[i]);
+	h = (h<<1) | (h<0 ? 1 : 0);
+	n = rb_hash(RARRAY(ary)->ptr[i]);
 	h ^= NUM2LONG(n);
     }
     return INT2FIX(h);