diff --git a/sys/dev/ath/if_ath.c b/sys/dev/ath/if_ath.c
index 1e83283c6cc..9e4e7c8622f 100644
--- a/sys/dev/ath/if_ath.c
+++ b/sys/dev/ath/if_ath.c
@@ -4350,7 +4350,7 @@ ath_calibrate(void *arg)
 	struct ath_hal *ah = sc->sc_ah;
 	struct ifnet *ifp = sc->sc_ifp;
 	struct ieee80211com *ic = ifp->if_l2com;
-	HAL_BOOL longCal, isCalDone;
+	HAL_BOOL longCal, isCalDone = AH_TRUE;
 	HAL_BOOL aniCal, shortCal = AH_FALSE;
 	int nextcal;
 
@@ -4400,6 +4400,7 @@ ath_calibrate(void *arg)
 
 	/* Only call if we're doing a short/long cal, not for ANI calibration */
 	if (shortCal || longCal) {
+		isCalDone = AH_FALSE;
 		if (ath_hal_calibrateN(ah, sc->sc_curchan, longCal, &isCalDone)) {
 			if (longCal) {
 				/*