diff --git a/reactos/lib/kernel32/debug/debugger.c b/reactos/lib/kernel32/debug/debugger.c
index bedecc76076..0f190b993fb 100644
--- a/reactos/lib/kernel32/debug/debugger.c
+++ b/reactos/lib/kernel32/debug/debugger.c
@@ -79,46 +79,14 @@ ContinueDebugEvent (
  *
  * @unmplemented
  */
-BOOL WINAPI
-DebugActiveProcess(DWORD dwProcessId)
+BOOL
+WINAPI
+DebugActiveProcess(
+    DWORD dwProcessId
+    )
 {
-  CSRSS_API_REQUEST Request;
-  CSRSS_API_REPLY Reply;
-  HANDLE hProcess;
-  NTSTATUS Status;
-
-  hProcess = OpenProcess(PROCESS_ALL_ACCESS,
-			 FALSE,
-			 dwProcessId);
-  if (hProcess == NULL)
-    return FALSE;
-
-  /* Notify CSRSS */
-  Request.Type = CSRSS_DEBUG_PROCESS;
-  Request.Data.DebugProcessRequest.DebuggeeProcessId = dwProcessId;
-  Request.Data.DebugProcessRequest.DebuggerProcessId = GetCurrentProcessId();
-  Request.Data.DebugProcessRequest.DebuggerThreadId = GetCurrentThreadId();
-  Status = CsrClientCallServer(&Request,
-			       &Reply,
-			       sizeof(CSRSS_API_REQUEST),
-			       sizeof(CSRSS_API_REPLY));
-  if (!NT_SUCCESS(Status) || !NT_SUCCESS(Status = Reply.Status))
-  {
-    SetLastError(ERROR_ACCESS_DENIED);
-    return FALSE;
-  }
-
-  CloseHandle(hProcess);
-
-  /* Connect the current process (debugger) to the debug subsystem */
-  Status = DbgUiConnectToDbg();
-  if (!NT_SUCCESS(Status))
-  {
-    SetLastErrorByStatus(Status);
-    return FALSE;
-  }
-
-  return TRUE;
+  SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+  return FALSE;
 }