diff --git a/reactos/tools/widl/widl.rbuild b/reactos/tools/widl/widl.rbuild
index a42e3b01ad1..93189fa7a7b 100644
--- a/reactos/tools/widl/widl.rbuild
+++ b/reactos/tools/widl/widl.rbuild
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../tools/rbuild/project.dtd">
-<module name="widl" type="buildtool">
+<module name="widl" type="buildtool" allowwarnings="true">
 	<define name="INT16">SHORT</define>
 	<define name="YYDEBUG">1</define>
 	<include base="wpp">.</include>
diff --git a/reactos/tools/wmc/wmc.rbuild b/reactos/tools/wmc/wmc.rbuild
index f548ac5f512..6822c8297c5 100644
--- a/reactos/tools/wmc/wmc.rbuild
+++ b/reactos/tools/wmc/wmc.rbuild
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../tools/rbuild/project.dtd">
-<module name="wmc" type="buildtool">
+<module name="wmc" type="buildtool" allowwarnings="true">
 	<define name="WINE_UNICODE_API">" "</define>
 	<include base="unicode">.</include>
 	<library>unicode</library>
diff --git a/reactos/tools/wmc/wmctypes.h b/reactos/tools/wmc/wmctypes.h
index 884200375b0..9fdb3a75b5b 100644
--- a/reactos/tools/wmc/wmctypes.h
+++ b/reactos/tools/wmc/wmctypes.h
@@ -22,7 +22,6 @@
 #define __WMC_WMCTYPES_H
 
 #include <stdarg.h>
-#include <string.h>
 #include <host/typedefs.h>
 
 /* Byteordering defines */
diff --git a/reactos/tools/wpp/wpp.rbuild b/reactos/tools/wpp/wpp.rbuild
index 56b059d1538..360aae86b7b 100644
--- a/reactos/tools/wpp/wpp.rbuild
+++ b/reactos/tools/wpp/wpp.rbuild
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../tools/rbuild/project.dtd">
-<module name="wpp" type="hoststaticlibrary">
+<module name="wpp" type="hoststaticlibrary" allowwarnings="true">
 	<file>lex.yy.c</file>
 	<file>preproc.c</file>
 	<file>wpp.c</file>