diff --git a/src/engine/client/backend_sdl.cpp b/src/engine/client/backend_sdl.cpp
index 1de4f34c2..41020b61d 100644
--- a/src/engine/client/backend_sdl.cpp
+++ b/src/engine/client/backend_sdl.cpp
@@ -423,7 +423,7 @@ const SGfxErrorContainer &CCommandProcessor_SDL_GL::GetError() const
 
 void CCommandProcessor_SDL_GL::ErroneousCleanup()
 {
-	return m_pGLBackend->ErroneousCleanup();
+	m_pGLBackend->ErroneousCleanup();
 }
 
 const SGfxWarningContainer &CCommandProcessor_SDL_GL::GetWarning() const
diff --git a/src/engine/client/graphics_threaded.cpp b/src/engine/client/graphics_threaded.cpp
index ec2642fd6..4d7ab860a 100644
--- a/src/engine/client/graphics_threaded.cpp
+++ b/src/engine/client/graphics_threaded.cpp
@@ -2784,12 +2784,12 @@ int CGraphics_Threaded::WindowOpen()
 
 void CGraphics_Threaded::SetWindowGrab(bool Grab)
 {
-	return m_pBackend->SetWindowGrab(Grab);
+	m_pBackend->SetWindowGrab(Grab);
 }
 
 void CGraphics_Threaded::NotifyWindow()
 {
-	return m_pBackend->NotifyWindow();
+	m_pBackend->NotifyWindow();
 }
 
 void CGraphics_Threaded::ReadPixel(ivec2 Position, ColorRGBA *pColor)
diff --git a/src/engine/client/input.cpp b/src/engine/client/input.cpp
index 96f5f42cc..bf8bb179a 100644
--- a/src/engine/client/input.cpp
+++ b/src/engine/client/input.cpp
@@ -216,7 +216,7 @@ void CInput::CJoystick::GetJoystickHatKeys(int Hat, int HatValue, int (&HatKeys)
 
 void CInput::CJoystick::GetHatValue(int Hat, int (&HatKeys)[2])
 {
-	return GetJoystickHatKeys(Hat, SDL_JoystickGetHat(m_pDelegate, Hat), HatKeys);
+	GetJoystickHatKeys(Hat, SDL_JoystickGetHat(m_pDelegate, Hat), HatKeys);
 }
 
 bool CInput::CJoystick::Relative(float *pX, float *pY)