diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 0106d343a68145806de6e843e51fc1fa1f8490be..c29d24fe1856a21ab073bee1255e8cc5ea664d27 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1683,7 +1683,7 @@ static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
 	 * ganged. Otherwise @chan should already contain the channel at
 	 * this point.
 	 */
-	if (dct_ganging_enabled(pvt) && pvt->nbcfg & K8_NBCFG_CHIPKILL)
+	if (dct_ganging_enabled(pvt) && (pvt->nbcfg & K8_NBCFG_CHIPKILL))
 		chan = get_channel_from_ecc_syndrome(mci, syndrome);
 
 	if (chan >= 0)