diff --git a/src/wifi/model/ht/ht-phy.h b/src/wifi/model/ht/ht-phy.h
index d9eb2c91b..4a98a7e5b 100644
--- a/src/wifi/model/ht/ht-phy.h
+++ b/src/wifi/model/ht/ht-phy.h
@@ -537,12 +537,6 @@ class HtPhy : public OfdmPhy
                                       double codingRate,
                                       uint8_t nss);
 
-    /**
-     * \param channelWidth the channel width in MHz
-     * \return the symbol duration excluding guard interval
-     */
-    static Time GetSymbolDuration(uint16_t channelWidth);
-
     /**
      * \param channelWidth the channel width in MHz
      * \return the number of usable subcarriers for data