diff --git a/bacnet-stack/demo/mstpcap/main.c b/bacnet-stack/demo/mstpcap/main.c
index d8ffe232..4b7efe62 100644
--- a/bacnet-stack/demo/mstpcap/main.c
+++ b/bacnet-stack/demo/mstpcap/main.c
@@ -450,7 +450,7 @@ uint16_t MSTP_Get_Reply(
     return 0;
 }
 
-static char Capture_Filename[32] = "mstp_20090123091200.cap";
+static char Capture_Filename[64] = "mstp_20090123091200.cap";
 static FILE *pFile = NULL;      /* stream pointer */
 #if defined(_WIN32)
 static HANDLE hPipe = INVALID_HANDLE_VALUE;     /* pipe handle */
diff --git a/bacnet-stack/demo/mstpcrc/main.c b/bacnet-stack/demo/mstpcrc/main.c
index f07a8b8b..a5589a8f 100644
--- a/bacnet-stack/demo/mstpcrc/main.c
+++ b/bacnet-stack/demo/mstpcrc/main.c
@@ -63,7 +63,7 @@ static unsigned CRC_Size = 8;
 /* save to capture file for viewing in Wireshark */
 static bool MSTP_Cap = false;
 static bool MSTP_Text_File = false;
-static char Capture_Filename[32] = "mstp_20090123091200.cap";
+static char Capture_Filename[64] = "mstp_20090123091200.cap";
 static FILE *pFile = NULL;      /* stream pointer */
 static FILE *pText_File = NULL;      /* stream pointer */