diff --git a/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm b/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
index 4e9ea96d03de4..9f0c44399a4a0 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
@@ -122,6 +122,7 @@ - (instancetype)initWithName:(NSString*)labelPrefix
 }
 
 - (void)dealloc {
+  [_labelPrefix release];
   [_pluginPublications release];
   _binaryMessenger.parent = nil;
   [_binaryMessenger release];