diff --git a/Windows/WindowsHost.cpp b/Windows/WindowsHost.cpp
index 614cd9aeb3f5..30e110f6789b 100644
--- a/Windows/WindowsHost.cpp
+++ b/Windows/WindowsHost.cpp
@@ -237,7 +237,7 @@ void WindowsHost::PollControllers() {
 
 void WindowsHost::BootDone() {
 	g_symbolMap->SortSymbols();
-	SendMessage(mainWindow_, WM_USER + 1, 0, 0);
+	PostMessage(mainWindow_, WM_USER + 1, 0, 0);
 
 	SetDebugMode(!g_Config.bAutoRun);
 	Core_EnableStepping(!g_Config.bAutoRun);