1 files changed, 1 insertions, 1 deletions
diff --git a/pcapio.c b/pcapio.c
index d29bd931a4..1527380671 100644
--- a/pcapio.c
+++ b/pcapio.c
@@ -526,7 +526,7 @@ libpcap_write_interface_description_block(FILE *fp,
 		option.type = IDB_TSRESOL;
 		option.value_length = sizeof(guint8);
 		WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
-		WRITE_DATA(fp, &if_speed, sizeof(guint8), *bytes_written, err);
+		WRITE_DATA(fp, &tsresol, sizeof(guint8), *bytes_written, err);
 		WRITE_DATA(fp, &padding, 3 , *bytes_written, err);
 	}