diff --git a/reactos/tools/rbuild/rbuild.mak b/reactos/tools/rbuild/rbuild.mak
index 5b0c5b55efe..a2d422d908e 100644
--- a/reactos/tools/rbuild/rbuild.mak
+++ b/reactos/tools/rbuild/rbuild.mak
@@ -296,7 +296,7 @@ RBUILD_TEST_OBJECTS = \
 	$(RBUILD_COMMON_OBJECTS) \
 	$(RBUILD_TEST_SPECIAL_OBJECTS)
 
-RBUILD_HOST_CXXFLAGS = -I$(RBUILD_BASE) -I$(TOOLS_BASE) -I$(INFLIB_BASE) $(TOOLS_CPPFLAGS) -Iinclude -Iinclude/reactos
+RBUILD_HOST_CXXFLAGS = -I$(RBUILD_BASE) -I$(TOOLS_BASE) -I$(INFLIB_BASE) $(TOOLS_CPPFLAGS) -Iinclude -Iinclude/reactos -Iinclude/host
 
 RBUILD_HOST_LFLAGS = $(TOOLS_LFLAGS)
 
@@ -463,7 +463,7 @@ $(RBUILD_MSVC_INT_)genguid.o: $(RBUILD_MSVC_BASE_)genguid.cpp $(RBUILD_HEADERS)
 $(RBUILD_MSVC_INT_)msvc.o: $(RBUILD_MSVC_BASE_)msvc.cpp $(RBUILD_HEADERS) | $(RBUILD_MSVC_INT)
 	$(ECHO_HOSTCC)
 	${host_gpp} $(RBUILD_HOST_CXXFLAGS) -c $< -o $@
-	
+
 $(RBUILD_MSVC_INT_)projmaker.o: $(RBUILD_MSVC_BASE_)projmaker.cpp $(RBUILD_HEADERS) | $(RBUILD_MSVC_INT)
 	$(ECHO_HOSTCC)
 	${host_gpp} $(RBUILD_HOST_CXXFLAGS) -c $< -o $@