diff --git a/include/ntsecapi.h b/include/ntsecapi.h
index a775be72f08..b5f969b0f6a 100644
--- a/include/ntsecapi.h
+++ b/include/ntsecapi.h
@@ -277,7 +277,7 @@ NTSTATUS WINAPI LsaEnumerateAccountsWithUserRight(LSA_HANDLE,PLSA_UNICODE_STRING
 NTSTATUS WINAPI LsaEnumerateTrustedDomains(LSA_HANDLE,PLSA_ENUMERATION_HANDLE,PVOID*,ULONG,PULONG);
 NTSTATUS WINAPI LsaEnumerateTrustedDomainsEx(LSA_HANDLE,PLSA_ENUMERATION_HANDLE,PVOID*,ULONG,PULONG);
 NTSTATUS WINAPI LsaFreeMemory(PVOID);
-NTSTATUS WINAPI LsaLookupNames(LSA_HANDLE,ULONG Count,PLSA_UNICODE_STRING,PLSA_REFERENCED_DOMAIN_LIST*,
+NTSTATUS WINAPI LsaLookupNames(LSA_HANDLE,ULONG,PLSA_UNICODE_STRING,PLSA_REFERENCED_DOMAIN_LIST*,
                                PLSA_TRANSLATED_SID*);
 NTSTATUS WINAPI LsaLookupNames2(LSA_HANDLE,ULONG,ULONG,PLSA_UNICODE_STRING,PLSA_REFERENCED_DOMAIN_LIST*,
                                 PLSA_TRANSLATED_SID2*);