diff --git a/reactos/dll/win32/advapi32/sec/sid.c b/reactos/dll/win32/advapi32/sec/sid.c
index 6b38fc573e4..7154c0bc8b5 100644
--- a/reactos/dll/win32/advapi32/sec/sid.c
+++ b/reactos/dll/win32/advapi32/sec/sid.c
@@ -1111,7 +1111,7 @@ IsWellKnownSid(IN PSID pSid,
 
     for (i = 0; i < sizeof(WellKnownSids)/sizeof(WellKnownSids[0]); i++)
         if (WellKnownSids[i].Type == WellKnownSidType)
-            if (EqualSid(pSid, (PSID)&(WellKnownSids[i].Sid.Revision)))
+            if (EqualSid(pSid, (PSID)((ULONG_PTR)&WellKnownSids[i].Sid.Revision)))
                 return TRUE;
 
     return FALSE;
diff --git a/reactos/dll/win32/advapi32/service/sctrl.c b/reactos/dll/win32/advapi32/service/sctrl.c
index 5c4fc5d9ee6..a0e43fb0934 100644
--- a/reactos/dll/win32/advapi32/service/sctrl.c
+++ b/reactos/dll/win32/advapi32/service/sctrl.c
@@ -47,7 +47,7 @@ static PACTIVE_SERVICE lpActiveServices = NULL;
 /* FUNCTIONS *****************************************************************/
 
 static PACTIVE_SERVICE
-ScLookupServiceByServiceName(LPWSTR lpServiceName)
+ScLookupServiceByServiceName(LPCWSTR lpServiceName)
 {
     DWORD i;
 
@@ -441,7 +441,7 @@ RegisterServiceCtrlHandlerExW(LPCWSTR lpServiceName,
 {
     PACTIVE_SERVICE Service;
 
-    Service = ScLookupServiceByServiceName((LPWSTR)lpServiceName);
+    Service = ScLookupServiceByServiceName(lpServiceName);
     if (Service == NULL)
     {
         return (SERVICE_STATUS_HANDLE)NULL;
diff --git a/reactos/lib/3rdparty/expat/expat.rbuild b/reactos/lib/3rdparty/expat/expat.rbuild
index f43252176e0..a6ebcbd84ca 100644
--- a/reactos/lib/3rdparty/expat/expat.rbuild
+++ b/reactos/lib/3rdparty/expat/expat.rbuild
@@ -1,4 +1,4 @@
-<module name="expat" type="staticlibrary">
+<module name="expat" type="staticlibrary" allowwarnings="true">
 	<include base="expat">.</include>
 	<include base="expat">lib</include>
 	<include base="ReactOS">include/reactos/libs/expat</include>