diff --git a/dlls/fltmgr.sys/fltmgr.sys.spec b/dlls/fltmgr.sys/fltmgr.sys.spec
index c217ad38918..7b1ba2983c2 100644
--- a/dlls/fltmgr.sys/fltmgr.sys.spec
+++ b/dlls/fltmgr.sys/fltmgr.sys.spec
@@ -79,7 +79,7 @@
 @ stub FltGetLowerInstance
 @ stub FltGetRequestorProcess
 @ stub FltGetRequestorProcessId
-@ stub FltGetRoutineAddress
+@ stdcall FltGetRoutineAddress(str)
 @ stub FltGetStreamContext
 @ stub FltGetStreamHandleContext
 @ stub FltGetSwappedBufferMdlAddress
diff --git a/dlls/fltmgr.sys/main.c b/dlls/fltmgr.sys/main.c
index 2ffde97da2b..16ca2845c26 100644
--- a/dlls/fltmgr.sys/main.c
+++ b/dlls/fltmgr.sys/main.c
@@ -64,3 +64,18 @@ void WINAPI FltUnregisterFilter( PFLT_FILTER filter )
 {
     FIXME( "(%p): stub\n", filter );
 }
+
+void* WINAPI FltGetRoutineAddress(LPCSTR name)
+{
+    static const WCHAR fltmgrW[] = {'f','l','t','m','g','r','.','s','y','s',0};
+    HMODULE mod = GetModuleHandleW(fltmgrW);
+    void *func;
+
+    func = GetProcAddress(mod, name);
+    if (func)
+        TRACE( "%s -> %p\n", debugstr_a(name), func );
+    else
+        FIXME( "%s not found\n", debugstr_a(name) );
+
+    return func;
+}
diff --git a/include/ddk/fltkernel.h b/include/ddk/fltkernel.h
index 00b7dc53635..8ebebfa2e81 100644
--- a/include/ddk/fltkernel.h
+++ b/include/ddk/fltkernel.h
@@ -654,6 +654,7 @@ typedef struct _FLT_REGISTRATION
 } FLT_REGISTRATION, *PFLT_REGISTRATION;
 
 
+void*    WINAPI FltGetRoutineAddress(LPCSTR name);
 NTSTATUS WINAPI FltRegisterFilter(PDRIVER_OBJECT, const FLT_REGISTRATION *, PFLT_FILTER *);
 NTSTATUS WINAPI FltStartFiltering(PFLT_FILTER);
 void     WINAPI FltUnregisterFilter(PFLT_FILTER);