diff --git a/drivers/net/wireless/ath/ath9k/common-spectral.h b/drivers/net/wireless/ath/ath9k/common-spectral.h
index 214c3baf502364dd72e06a3a56fc597b7957037b..82d9dd29652cd2912239ff51246bdc7f24e6b8a8 100644
--- a/drivers/net/wireless/ath/ath9k/common-spectral.h
+++ b/drivers/net/wireless/ath/ath9k/common-spectral.h
@@ -138,17 +138,7 @@ void ath9k_cmn_spectral_scan_trigger(struct ath_common *common,
 int ath9k_cmn_spectral_scan_config(struct ath_common *common,
 			       struct ath_spec_scan_priv *spec_priv,
 			       enum spectral_mode spectral_mode);
-
-#ifdef CONFIG_ATH9K_DEBUGFS
 int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv, struct ieee80211_hdr *hdr,
 		    struct ath_rx_status *rs, u64 tsf);
-#else
-static inline int ath_cmn_process_fft(struct ath_spec_scan_priv *spec_priv,
-				  struct ieee80211_hdr *hdr,
-				  struct ath_rx_status *rs, u64 tsf)
-{
-	return 0;
-}
-#endif /* CONFIG_ATH9K_DEBUGFS */
 
 #endif /* SPECTRAL_H */