diff --git a/dll/win32/mpr/mpr.spec b/dll/win32/mpr/mpr.spec
index 119590bf5d1..2908ce9bea5 100644
--- a/dll/win32/mpr/mpr.spec
+++ b/dll/win32/mpr/mpr.spec
@@ -24,7 +24,7 @@
 25 stdcall @(ptr long) _MPR_25
 
 @ stdcall -private DllCanUnloadNow()
-@ stub DllGetClassObject
+@ stub -private DllGetClassObject
 @ stdcall MultinetGetConnectionPerformanceA(ptr ptr)
 @ stdcall MultinetGetConnectionPerformanceW(ptr ptr)
 @ stdcall MultinetGetErrorTextA(long ptr long)