diff --git a/src/wifi/model/regular-wifi-mac.cc b/src/wifi/model/regular-wifi-mac.cc
index 767332ce7..b7e6be3f1 100644
--- a/src/wifi/model/regular-wifi-mac.cc
+++ b/src/wifi/model/regular-wifi-mac.cc
@@ -27,6 +27,7 @@
 #include "dcf-manager.h"
 #include "msdu-aggregator.h"
 #include "mpdu-aggregator.h"
+#include "wifi-utils.h"
 
 namespace ns3 {
 
@@ -265,15 +266,15 @@ RegularWifiMac::GetHeCapabilities (void) const
     {
       capabilities.SetHeSupported (1);
       uint8_t channelWidthSet = 0;
-      if (m_phy->GetChannelWidth () >= 40 && m_phy->Is2_4Ghz (m_phy->GetFrequency ()))
+      if (m_phy->GetChannelWidth () >= 40 && Is2_4Ghz (m_phy->GetFrequency ()))
         {
           channelWidthSet |= 0x01;
         }
-      if (m_phy->GetChannelWidth () >= 80 && m_phy->Is5Ghz (m_phy->GetFrequency ()))
+      if (m_phy->GetChannelWidth () >= 80 && Is5Ghz (m_phy->GetFrequency ()))
         {
           channelWidthSet |= 0x02;
         }
-      if (m_phy->GetChannelWidth () >= 160 && m_phy->Is5Ghz (m_phy->GetFrequency ()))
+      if (m_phy->GetChannelWidth () >= 160 && Is5Ghz (m_phy->GetFrequency ()))
         {
           channelWidthSet |= 0x04;
         }
diff --git a/src/wifi/model/wifi-phy.cc b/src/wifi/model/wifi-phy.cc
index 2155f3477..27f52ed21 100644
--- a/src/wifi/model/wifi-phy.cc
+++ b/src/wifi/model/wifi-phy.cc
@@ -1272,26 +1272,6 @@ WifiPhy::GetFrequency (void) const
   return m_channelCenterFrequency;
 }
 
-bool
-WifiPhy::Is2_4Ghz (double frequency)
-{
-  if (frequency >= 2400 && frequency <= 2500)
-    {
-      return true;
-    }
-  return false;
-}
-
-bool
-WifiPhy::Is5Ghz (double frequency)
-{
-  if (frequency >= 5000 && frequency <= 6000)
-    {
-      return true;
-    }
-  return false;
-}
-
 void
 WifiPhy::SetChannelWidth (uint8_t channelwidth)
 {
diff --git a/src/wifi/model/wifi-phy.h b/src/wifi/model/wifi-phy.h
index 09148aadc..c81ce348e 100644
--- a/src/wifi/model/wifi-phy.h
+++ b/src/wifi/model/wifi-phy.h
@@ -1521,16 +1521,6 @@ public:
    * \return the maximum number of supported RX spatial streams
    */
   uint8_t GetMaxSupportedRxSpatialStreams (void) const;
-  /**
-   * \param frequency the frequency to check
-   * \return whether frequency is in the 2.4 GHz band
-   */
-  static bool Is2_4Ghz (double frequency);
-  /**
-   * \param frequency the frequency to check
-   * \return whether frequency is in the 5 GHz band
-   */
-  static bool Is5Ghz (double frequency);
   /**
    * Enable or disable support for HT/VHT short guard interval.
    *
diff --git a/src/wifi/model/wifi-utils.cc b/src/wifi/model/wifi-utils.cc
index e654781bf..aa64edbd5 100644
--- a/src/wifi/model/wifi-utils.cc
+++ b/src/wifi/model/wifi-utils.cc
@@ -57,6 +57,26 @@ RatioToDb (double ratio)
   return 10.0 * std::log10 (ratio);
 }
 
+bool
+Is2_4Ghz (double frequency)
+{
+  if (frequency >= 2400 && frequency <= 2500)
+    {
+      return true;
+    }
+  return false;
+}
+
+bool
+Is5Ghz (double frequency)
+{
+  if (frequency >= 5000 && frequency <= 6000)
+    {
+      return true;
+    }
+  return false;
+}
+
 uint16_t
 ConvertGuardIntervalToNanoSeconds (WifiMode mode, bool htShortGuardInterval, Time heGuardInterval)
 {
diff --git a/src/wifi/model/wifi-utils.h b/src/wifi/model/wifi-utils.h
index c7f74eaf4..ac99b20b6 100644
--- a/src/wifi/model/wifi-utils.h
+++ b/src/wifi/model/wifi-utils.h
@@ -71,6 +71,16 @@ double WToDbm (double w);
  * \return dB
  */
 double RatioToDb (double ratio);
+/**
+ * \param frequency the frequency to check
+ * \return whether frequency is in the 2.4 GHz band
+ */
+bool Is2_4Ghz (double frequency);
+/**
+ * \param frequency the frequency to check
+ * \return whether frequency is in the 5 GHz band
+ */
+bool Is5Ghz (double frequency);
 /**
  * Convert the guard interval to nanoseconds based on the wifimode.
  *