diff --git a/array.c b/array.c
index 4775472221..9884092ebe 100644
--- a/array.c
+++ b/array.c
@@ -1606,6 +1606,7 @@ rb_ary_splice(VALUE ary, long beg, long len, VALUE rpl)
 	    MEMMOVE(RARRAY_PTR(ary) + beg, RARRAY_CONST_PTR(rpl), VALUE, rlen);
 	}
     }
+    RB_GC_GUARD(rpl);
 }
 
 void