diff --git a/src/NimBLEAdvertising.cpp b/src/NimBLEAdvertising.cpp
index f626cc7..bdf1253 100644
--- a/src/NimBLEAdvertising.cpp
+++ b/src/NimBLEAdvertising.cpp
@@ -136,20 +136,6 @@ void NimBLEAdvertising::setMaxInterval(uint16_t maxinterval) {
 } // setMaxInterval
 
 
-/**
- * @brief NOP - Not yet implemented, dummy function for backward compatibility.
- */
-void NimBLEAdvertising::setMinPreferred(uint16_t mininterval) {
-} // setMinPreferred
-
-
-/**
- * @brief NOP - Not yet implemented, dummy function for backward compatibility.
- */
-void NimBLEAdvertising::setMaxPreferred(uint16_t maxinterval) {
-} // setMaxPreferred
-
-
 /**
  * @brief Set if scan response is available.
  * @param [in] set true = scan response available.
diff --git a/src/NimBLEAdvertising.h b/src/NimBLEAdvertising.h
index ed0ffc1..8f8ca17 100644
--- a/src/NimBLEAdvertising.h
+++ b/src/NimBLEAdvertising.h
@@ -86,8 +86,6 @@ public:
     void setAdvertisementData(NimBLEAdvertisementData& advertisementData);
     void setScanFilter(bool scanRequertWhitelistOnly, bool connectWhitelistOnly);
     void setScanResponseData(NimBLEAdvertisementData& advertisementData);
-    void setMinPreferred(uint16_t);
-    void setMaxPreferred(uint16_t);
     void setScanResponse(bool);
 
 private: