diff --git a/src/win32/i_system.cpp b/src/win32/i_system.cpp
index 5b6a69c63..d25229b67 100644
--- a/src/win32/i_system.cpp
+++ b/src/win32/i_system.cpp
@@ -1601,7 +1601,7 @@ unsigned int I_MakeRNGSeed()
 FString I_GetLongPathName(FString shortpath)
 {
 	static TOptWin32Proc<DWORD (WINAPI*)(LPCTSTR, LPTSTR, DWORD)>
-		GetLongPathName("kernel32.dll", "GetLongPathNameW", "GetLongPathNameA");
+		GetLongPathName("kernel32.dll", "GetLongPathNameA", NULL);
 
 	// Doesn't exist on NT4
 	if (GetLongPathName == NULL)