1 files changed, 2 insertions, 2 deletions
diff --git a/insnhelper.ci b/insnhelper.ci
index 142473f83e..7544345a73 100644
--- a/insnhelper.ci
+++ b/insnhelper.ci
@@ -1340,12 +1340,12 @@ vm_expandarray(rb_control_frame_t *cfp, VALUE ary, int num, int flag)
     volatile VALUE tmp_ary;
     int len;
 
-    cfp->sp += space_size;
-
     if (TYPE(ary) != T_ARRAY) {
 	ary = rb_ary_to_ary(ary);
     }
 
+    cfp->sp += space_size;
+
     tmp_ary = ary;
     ptr = RARRAY_PTR(ary);
     len = RARRAY_LEN(ary);