diff --git a/stepmania/src/arch/ArchHooks/ArchHooks.cpp b/stepmania/src/arch/ArchHooks/ArchHooks.cpp
index 90fd71673c..64997c5550 100644
--- a/stepmania/src/arch/ArchHooks/ArchHooks.cpp
+++ b/stepmania/src/arch/ArchHooks/ArchHooks.cpp
@@ -1,9 +1,11 @@
 #include "global.h"
 #include "ArchHooks.h"
+#include "RageLog.h"
 #include "RageThreads.h"
 
 bool ArchHooks::s_bQuitting = false;
 bool ArchHooks::s_bToggleWindowed = false;
+static bool g_bHasFocus = true;
 // Keep from pulling RageThreads.h into ArchHooks.h
 static RageMutex s_AHLock( "ArchHooks lock" );
 ArchHooks *HOOKS = NULL;
@@ -29,6 +31,20 @@ ArchHooks *MakeArchHooks()
 	return new ARCH_HOOKS;
 }
 
+void ArchHooks::SetHasFocus( bool bHasFocus )
+{
+	if( bHasFocus == g_bHasFocus )
+		return;
+	g_bHasFocus = bHasFocus;
+
+	LOG->Trace( "App %s focus", bHasFocus? "has":"doesn't have" );
+}
+
+bool ArchHooks::AppHasFocus()
+{
+	return g_bHasFocus;
+}
+
 /*
  * (c) 2003-2004 Glenn Maynard, Chris Danford
  * All rights reserved.
diff --git a/stepmania/src/arch/ArchHooks/ArchHooks.h b/stepmania/src/arch/ArchHooks/ArchHooks.h
index b574fc8054..3c38d40a85 100644
--- a/stepmania/src/arch/ArchHooks/ArchHooks.h
+++ b/stepmania/src/arch/ArchHooks/ArchHooks.h
@@ -90,6 +90,16 @@ public:
 	 */
 	static void MountInitialFilesystems( const RString &sDirOfExecutable );
 
+	/*
+	 * Platform-specific code calls this to indicate focus changes.
+	 */
+	void SetHasFocus( bool bAppHasFocus );
+
+	/*
+	 * Return true if the application has input focus.
+	 */
+	bool AppHasFocus();
+
 private:
 	/* This are helpers for GetMicrosecondsSinceStart on systems with a timer
 	 * that may loop or move backwards. */