diff --git a/src/m_specialpaths.cpp b/src/m_specialpaths.cpp
index 3e12be17d1..7a48a2b9cb 100644
--- a/src/m_specialpaths.cpp
+++ b/src/m_specialpaths.cpp
@@ -83,7 +83,7 @@ bool GetKnownFolder(int shell_folder, REFKNOWNFOLDERID known_folder, bool create
 	// new to Vista, hence the reason we support both.
 	if (SHGetKnownFolderPath == NULL)
 	{
-		static TOptWin32Proc<HRESULT(*)(HWND, int, HANDLE, DWORD, LPTSTR)>
+		static TOptWin32Proc<HRESULT(WINAPI*)(HWND, int, HANDLE, DWORD, LPTSTR)>
 			SHGetFolderPathA("shell32.dll", "SHGetFolderPathA");
 
 		// NT4 doesn't even have this function.