diff --git a/vm/os-windows.cpp b/vm/os-windows.cpp
index 43e70a3368..5b29f23f02 100644
--- a/vm/os-windows.cpp
+++ b/vm/os-windows.cpp
@@ -5,7 +5,7 @@ namespace factor {
 HMODULE hFactorDll;
 
 void factor_vm::init_ffi() {
-  hFactorDll = GetModuleHandle(FACTOR_DLL);
+  hFactorDll = GetModuleHandle(NULL);
   if (!hFactorDll)
     fatal_error("GetModuleHandle() failed", 0);
 }
diff --git a/vm/os-windows.hpp b/vm/os-windows.hpp
index 1f9a1da715..dd429340fd 100644
--- a/vm/os-windows.hpp
+++ b/vm/os-windows.hpp
@@ -50,8 +50,6 @@ typedef HANDLE THREADHANDLE;
 
 #define FACTOR_OS_STRING "windows"
 
-#define FACTOR_DLL NULL
-
 // SSE traps raise these exception codes, which are defined in internal NT
 // headers
 // but not winbase.h