diff --git a/dlls/ntdll/sec.c b/dlls/ntdll/sec.c
index 28158388836..fd5ed7a7601 100644
--- a/dlls/ntdll/sec.c
+++ b/dlls/ntdll/sec.c
@@ -1341,7 +1341,7 @@ NTSTATUS WINAPI RtlGetAce(PACL pAcl,DWORD dwAceIndex,LPVOID *pAce )
 
 	TRACE("(%p,%d,%p)\n",pAcl,dwAceIndex,pAce);
 
-	if ((dwAceIndex < 0) || (dwAceIndex > pAcl->AceCount))
+	if (dwAceIndex > pAcl->AceCount)
 		return STATUS_INVALID_PARAMETER;
 
 	ace = (PACE_HEADER)(pAcl + 1);