diff --git a/epan/dissectors/packet-umts_fp.c b/epan/dissectors/packet-umts_fp.c
index 86588fea8f..d1af4e72e1 100644
--- a/epan/dissectors/packet-umts_fp.c
+++ b/epan/dissectors/packet-umts_fp.c
@@ -3808,7 +3808,7 @@ heur_dissect_fp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data
     return TRUE;
 }
 static guint8 fakes =5; /*[] ={1,5,8};*/
-static guint8 fake_map[31];
+static guint8 fake_map[256];
 
  /*
  * TODO: This need to be fixed!