1 files changed, 3 insertions, 0 deletions
diff --git a/op.h b/op.h
index f6375b1c72..c230dd0b99 100644
--- a/op.h
+++ b/op.h
@@ -84,6 +84,9 @@ typedef U16 PADOFFSET;
 /* Private for OP_FLIP/FLOP */
 #define OPpFLIP_LINENUM		1	/* Range arg potentially a line num. */
 
+/* Private for OP_LIST */
+#define OPpLIST_GUESSED		1	/* Guessed that pushmark was needed. */
+
 struct op {
     BASEOP
 };