diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c
index f87325b0482f..a51509e6d115 100644
--- a/sys/dev/fxp/if_fxp.c
+++ b/sys/dev/fxp/if_fxp.c
@@ -901,6 +901,7 @@ fxp_detach(device_t dev)
 	CSR_WRITE_1(sc, FXP_CSR_SCB_INTRCNTL, FXP_SCB_INTR_DISABLE);
 	fxp_stop(sc);
 	FXP_UNLOCK(sc);
+	callout_drain(&sc->stat_ch);
 
 	/*
 	 * Close down routes etc.
diff --git a/sys/dev/hme/if_hme.c b/sys/dev/hme/if_hme.c
index 703369172e12..8ed71b164008 100644
--- a/sys/dev/hme/if_hme.c
+++ b/sys/dev/hme/if_hme.c
@@ -388,6 +388,7 @@ hme_detach(struct hme_softc *sc)
 	HME_LOCK(sc);
 	hme_stop(sc);
 	HME_UNLOCK(sc);
+	callout_drain(&sc->sc_tick_ch);
 	device_delete_child(sc->sc_dev, sc->sc_miibus);
 
 	for (i = 0; i < HME_NTXQ; i++) {