diff --git a/drivers/filters/fltmgr/fltmgr.spec b/drivers/filters/fltmgr/fltmgr.spec
index 9249ac83113..ad99c6c40d8 100644
--- a/drivers/filters/fltmgr/fltmgr.spec
+++ b/drivers/filters/fltmgr/fltmgr.spec
@@ -1,7 +1,6 @@
 
  @ stdcall FltRegisterFilter(ptr ptr ptr)
  @ stdcall FltUnregisterFilter(ptr)
- @ stdcall FltCloseCommunicationPort(ptr)
  @ stdcall FltStartFiltering(ptr)
  @ stdcall FltBuildDefaultSecurityDescriptor(ptr long)
  @ stdcall FltFreeSecurityDescriptor(ptr)