diff --git a/src/platform/Darwin/BleConnectionDelegateImpl.mm b/src/platform/Darwin/BleConnectionDelegateImpl.mm
index 5afd14fcb89199..ad1093007473bb 100644
--- a/src/platform/Darwin/BleConnectionDelegateImpl.mm
+++ b/src/platform/Darwin/BleConnectionDelegateImpl.mm
@@ -698,7 +698,7 @@ - (void)removePeripheralFromCache:(CBPeripheral *)peripheral
 
 - (void)removePeripheralsFromCache
 {
-    for (CBPeripheral * peripheral in _cachedPeripherals) {
+    for (CBPeripheral * peripheral in [_cachedPeripherals allValues]) {
         [self removePeripheralFromCache:peripheral];
     }
 }