diff --git a/sys/dev/dc/if_dc.c b/sys/dev/dc/if_dc.c
index 874cac76d56e..21bead27c524 100644
--- a/sys/dev/dc/if_dc.c
+++ b/sys/dev/dc/if_dc.c
@@ -2431,7 +2431,7 @@ dc_pnic_rx_bug_war(struct dc_softc *sc, int idx)
 	i = sc->dc_pnic_rx_bug_save;
 	cur_rx = &sc->dc_ldata->dc_rx_list[idx];
 	ptr = sc->dc_pnic_rx_buf;
-	bzero(ptr, sizeof(DC_RXLEN * 5));
+	bzero(ptr, DC_RXLEN * 5);
 
 	/* Copy all the bytes from the bogus buffers. */
 	while (1) {
diff --git a/sys/pci/if_dc.c b/sys/pci/if_dc.c
index 874cac76d56e..21bead27c524 100644
--- a/sys/pci/if_dc.c
+++ b/sys/pci/if_dc.c
@@ -2431,7 +2431,7 @@ dc_pnic_rx_bug_war(struct dc_softc *sc, int idx)
 	i = sc->dc_pnic_rx_bug_save;
 	cur_rx = &sc->dc_ldata->dc_rx_list[idx];
 	ptr = sc->dc_pnic_rx_buf;
-	bzero(ptr, sizeof(DC_RXLEN * 5));
+	bzero(ptr, DC_RXLEN * 5);
 
 	/* Copy all the bytes from the bogus buffers. */
 	while (1) {