diff --git a/src/wiphy.c b/src/wiphy.c
index c286bb48..ecc345e9 100644
--- a/src/wiphy.c
+++ b/src/wiphy.c
@@ -643,7 +643,7 @@ bool wiphy_rrm_capable(struct wiphy *wiphy)
 	return false;
 }
 
-bool wiphy_has_ext_feature(struct wiphy *wiphy, uint32_t feature)
+bool wiphy_has_ext_feature(const struct wiphy *wiphy, uint32_t feature)
 {
 	return feature < sizeof(wiphy->ext_features) * 8 &&
 		test_bit(wiphy->ext_features, feature);
diff --git a/src/wiphy.h b/src/wiphy.h
index 43e4aeb3..c527c79d 100644
--- a/src/wiphy.h
+++ b/src/wiphy.h
@@ -119,7 +119,7 @@ bool wiphy_can_randomize_mac_addr(struct wiphy *wiphy);
 bool wiphy_rrm_capable(struct wiphy *wiphy);
 bool wiphy_supports_ext_key_id(struct wiphy *wiphy);
 bool wiphy_has_feature(struct wiphy *wiphy, uint32_t feature);
-bool wiphy_has_ext_feature(struct wiphy *wiphy, uint32_t feature);
+bool wiphy_has_ext_feature(const struct wiphy *wiphy, uint32_t feature);
 uint8_t wiphy_get_max_num_ssids_per_scan(struct wiphy *wiphy);
 uint16_t wiphy_get_max_scan_ie_len(struct wiphy *wiphy);
 uint32_t wiphy_get_max_roc_duration(struct wiphy *wiphy);