diff --git a/ext/libclementine-common/core/closure.h b/ext/libclementine-common/core/closure.h
index ed7ab49d6..ca0081109 100644
--- a/ext/libclementine-common/core/closure.h
+++ b/ext/libclementine-common/core/closure.h
@@ -213,11 +213,11 @@ _detail::ClosureBase* NewClosure(
   return NewClosure(sender, signal, boost::bind(callback, args...));
 }
 
-template <typename T, typename... Args>
+template <typename T, typename Unused, typename... Args>
 _detail::ClosureBase* NewClosure(
     QObject* sender,
     const char* signal,
-    T* receiver, void (T::*callback)(Args...),
+    T* receiver, Unused (T::*callback)(Args...),
     const Args&... args) {
   return NewClosure(sender, signal, boost::bind(callback, receiver, args...));
 }
diff --git a/tests/closure_test.cpp b/tests/closure_test.cpp
index 2eeb48059..3bba20033 100644
--- a/tests/closure_test.cpp
+++ b/tests/closure_test.cpp
@@ -107,8 +107,9 @@ namespace {
 class Bar {
  public:
   explicit Bar(int a) : foo_(a) {}
-  void Foo(int* answer) {
+  bool Foo(int* answer) {
     *answer = foo_;
+    return true;
   }
 
  private: