Index: head/sys/dev/iwm/if_iwm.c
===================================================================
--- head/sys/dev/iwm/if_iwm.c
+++ head/sys/dev/iwm/if_iwm.c
@@ -739,7 +739,7 @@
 			}
 			capa = (const struct iwm_ucode_capa *)tlv_data;
 			idx = le32toh(capa->api_index);
-			if (idx > howmany(IWM_NUM_UCODE_TLV_CAPA, 32)) {
+			if (idx >= howmany(IWM_NUM_UCODE_TLV_CAPA, 32)) {
 				device_printf(sc->sc_dev,
 				    "unsupported API index %d\n", idx);
 				goto parse_out;