diff --git a/sys/dev/igc/if_igc.c b/sys/dev/igc/if_igc.c
--- a/sys/dev/igc/if_igc.c
+++ b/sys/dev/igc/if_igc.c
@@ -936,6 +936,7 @@
 			goto igc_set_next_eitr;
 		}
 
+		bytes = bytes_packets = 0;
 		/* Get largest values from the associated tx and rx ring */
 		if (txr->tx_bytes && txr->tx_packets) {
 			bytes = txr->tx_bytes;