diff --git a/epan/dissectors/packet-mp2t.c b/epan/dissectors/packet-mp2t.c
index 69e8ce64b7..4c03f9ac0d 100644
--- a/epan/dissectors/packet-mp2t.c
+++ b/epan/dissectors/packet-mp2t.c
@@ -1329,7 +1329,7 @@ dissect_mp2t( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U
     volatile guint        offset = 0;
     conversation_t       *conv;
     mp2t_analysis_data_t *mp2t_data;
-    gint                  dir;
+    volatile gint         dir;
     const char           *saved_proto;
 
     conv = find_or_create_conversation(pinfo);