diff --git a/features/FEATURE_BLE/ble/gap/Gap.h b/features/FEATURE_BLE/ble/gap/Gap.h
index 4494dc50b4..ef0af66caf 100644
--- a/features/FEATURE_BLE/ble/gap/Gap.h
+++ b/features/FEATURE_BLE/ble/gap/Gap.h
@@ -726,8 +726,8 @@ public:
      * @see EventHandler::onScanTimeout when scanning timeout.
      */
     virtual ble_error_t startScan(
-        duplicates_filter_t filtering = duplicates_filter_t::DISABLE,
         scan_duration_t duration = scan_duration_t::forever(),
+        duplicates_filter_t filtering = duplicates_filter_t::DISABLE,
         scan_period_t period = scan_period_t(0)
     );
 
diff --git a/features/FEATURE_BLE/ble/generic/GenericGap.h b/features/FEATURE_BLE/ble/generic/GenericGap.h
index 300ca5d9c6..8b3fd4af13 100644
--- a/features/FEATURE_BLE/ble/generic/GenericGap.h
+++ b/features/FEATURE_BLE/ble/generic/GenericGap.h
@@ -175,8 +175,8 @@ public:
     /** @copydoc Gap::startScan
      */
     virtual ble_error_t startScan(
-        duplicates_filter_t filtering,
         scan_duration_t duration,
+        duplicates_filter_t filtering,
         scan_period_t period
     );
 
diff --git a/features/FEATURE_BLE/source/gap/Gap.cpp b/features/FEATURE_BLE/source/gap/Gap.cpp
index 7a048034fb..3515ddd531 100644
--- a/features/FEATURE_BLE/source/gap/Gap.cpp
+++ b/features/FEATURE_BLE/source/gap/Gap.cpp
@@ -145,8 +145,8 @@ ble_error_t Gap::setScanParameters(const ScanParameters &params)
 };
 
 ble_error_t Gap::startScan(
-    duplicates_filter_t filtering,
     scan_duration_t duration,
+    duplicates_filter_t filtering,
     scan_period_t period
 )
 {
diff --git a/features/FEATURE_BLE/source/generic/GenericGap.cpp b/features/FEATURE_BLE/source/generic/GenericGap.cpp
index 95a32e394b..6998191d32 100644
--- a/features/FEATURE_BLE/source/generic/GenericGap.cpp
+++ b/features/FEATURE_BLE/source/generic/GenericGap.cpp
@@ -2869,8 +2869,8 @@ ble_error_t GenericGap::setScanParameters(const ScanParameters &params)
 }
 
 ble_error_t GenericGap::startScan(
-    duplicates_filter_t filtering,
     scan_duration_t duration,
+    duplicates_filter_t filtering,
     scan_period_t period
 )
 {