1 files changed, 3 insertions, 0 deletions
diff --git a/op.c b/op.c
index 77a6267d75..5a51f9b83c 100644
--- a/op.c
+++ b/op.c
@@ -4216,6 +4216,9 @@ Perl_cv_undef(pTHX_ CV *cv)
 	}
 	CvPADLIST(cv) = Nullav;
     }
+    if (CvXSUB(cv)) {
+        CvXSUB(cv) = 0;
+    }
     CvFLAGS(cv) = 0;
 }