diff --git a/iOS/FlipperKitTestUtils/BlockBasedSonarPlugin.h b/iOS/FlipperKitTestUtils/BlockBasedSonarPlugin.h
index ad9ad2abb..53bf5ba05 100644
--- a/iOS/FlipperKitTestUtils/BlockBasedSonarPlugin.h
+++ b/iOS/FlipperKitTestUtils/BlockBasedSonarPlugin.h
@@ -12,7 +12,7 @@
 @protocol FlipperConnection;
 
 typedef void (^ConnectBlock)(id<FlipperConnection>);
-typedef void (^DisconnectBlock)();
+typedef void (^DisconnectBlock)(void);
 
 @interface BlockBasedSonarPlugin : NSObject<FlipperPlugin>