diff --git a/reactos/Makefile b/reactos/Makefile
index dc823d59275..f15ab70ae79 100644
--- a/reactos/Makefile
+++ b/reactos/Makefile
@@ -182,7 +182,7 @@ HOST=mingw32-windows
 endif
 else
 HOST=mingw32-linux
-HOST_CFLAGS+=-fshort-wchar
+HOST_CFLAGS+=-fshort-wchar -D__LINUX__
 HOST_CPPFLAGS+=-fshort-wchar
 endif
 endif
diff --git a/reactos/tools/sysreg/sysreg.rbuild b/reactos/tools/sysreg/sysreg.rbuild
index 0958973d0f0..458e67cea25 100644
--- a/reactos/tools/sysreg/sysreg.rbuild
+++ b/reactos/tools/sysreg/sysreg.rbuild
@@ -2,17 +2,6 @@
 
 <!DOCTYPE module SYSTEM "../../tools/rbuild/project.dtd">
 <module name="sysreg" type="buildtool">
-	<if property="HOST" value="mingw32-linux">
-		<define name="__LINUX__" />
-	</if>
-	<!--ifnot property="HOST" value="mingw32-linux">
-		<include base="ReactOS">include</include>
-		<include base="ReactOS">include/reactos</include>
-		<include base="ReactOS">include/psdk</include>
-		<include base="ReactOS">include/crt</include>
-		<include base="ReactOS">include/reactos/libs</include>
-		<include base="ReactOS" root="intermediate">include/psdk</include>
-	</ifnot-->
 	<file>conf_parser.cpp</file>
 	<file>env_var.cpp</file>
 	<file>rosboot_test.cpp</file>