diff --git a/Engine/source/core/util/tSignal.h b/Engine/source/core/util/tSignal.h
index 206533458..4960ba8dd 100644
--- a/Engine/source/core/util/tSignal.h
+++ b/Engine/source/core/util/tSignal.h
@@ -161,8 +161,8 @@ protected:
    SignalSig *mSignal;
 
 private:
-   SignalSlot( const SignalSlot&) {}
-   SignalSlot& operator=( const SignalSlot&) {}
+   SignalSlot( const SignalSlot&);
+   SignalSlot& operator=( const SignalSlot&);
 };
 
 template<typename Signature> class SignalBaseT : public SignalBase