diff --git a/stepmania/src/arch/InputHandler/InputHandler_DirectInput.cpp b/stepmania/src/arch/InputHandler/InputHandler_DirectInput.cpp
index 09f6dc018e..c63d6b94ce 100644
--- a/stepmania/src/arch/InputHandler/InputHandler_DirectInput.cpp
+++ b/stepmania/src/arch/InputHandler/InputHandler_DirectInput.cpp
@@ -443,6 +443,9 @@ void InputHandler_DInput::InputThreadMain()
 	if(!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST))
 		LOG->Warn(werr_ssprintf(GetLastError(), "Failed to set DirectInput thread priority"));
 
+	/* Enable priority boosting. */
+	SetThreadPriorityBoost( GetCurrentThread(), FALSE );
+
 	unsigned i;
 	vector<DIDevice*> BufferedDevices, UnbufferedDevices;
 	HANDLE Handle = CreateEvent(NULL, FALSE, FALSE, NULL);
diff --git a/stepmania/src/arch/InputHandler/InputHandler_Win32_Pump.cpp b/stepmania/src/arch/InputHandler/InputHandler_Win32_Pump.cpp
index a38930b3ab..06ee22b1fc 100644
--- a/stepmania/src/arch/InputHandler/InputHandler_Win32_Pump.cpp
+++ b/stepmania/src/arch/InputHandler/InputHandler_Win32_Pump.cpp
@@ -90,6 +90,9 @@ void InputHandler_Win32_Pump::InputThreadMain()
 	if(!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST))
 		LOG->Warn(werr_ssprintf(GetLastError(), "Failed to set Pump thread priority"));
 
+	/* Enable priority boosting. */
+	SetThreadPriorityBoost( GetCurrentThread(), FALSE );
+
 	vector<WindowsFileIO *> sources;
 	int i;
 	for(i = 0; i < NUM_PUMPS; ++i)