diff --git a/net/wireless/core.h b/net/wireless/core.h
index a570ff9..8672e02 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -447,6 +447,10 @@
 
 u16 cfg80211_calculate_bitrate(struct rate_info *rate);
 
+int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
+			   const u8 *rates, unsigned int n_rates,
+			   u32 *mask);
+
 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 				 u32 beacon_int);