diff --git a/Kernel/makeall.sh b/Kernel/makeall.sh
index e6942443fb..5de94b885d 100755
--- a/Kernel/makeall.sh
+++ b/Kernel/makeall.sh
@@ -18,6 +18,8 @@ build_targets=""
 # Build the host-side tools first, since they are needed to build some programs.
 build_targets="$build_targets ../DevTools/IPCCompiler"
 build_targets="$build_targets ../DevTools/FormCompiler"
+build_targets="$build_targets ../LibHTML/CodeGenerators/CodeGenerators/Generate_CSS_PropertyID_cpp"
+build_targets="$build_targets ../LibHTML/CodeGenerators/CodeGenerators/Generate_CSS_PropertyID_h"
 
 # Build LibC, LibCore, LibIPC and LibThread before IPC servers, since they depend on them.
 build_targets="$build_targets ../Libraries/LibC"
diff --git a/Libraries/LibHTML/Makefile b/Libraries/LibHTML/Makefile
index bb4f708ae6..cb38b174e8 100644
--- a/Libraries/LibHTML/Makefile
+++ b/Libraries/LibHTML/Makefile
@@ -79,13 +79,9 @@ CSS/DefaultStyleSheetSource.cpp: CSS/Default.css Scripts/GenerateStyleSheetSourc
 	@echo "GENERATE $@"; Scripts/GenerateStyleSheetSource.sh default_stylesheet_source $< > $@
 
 CSS/PropertyID.h: CSS/Properties.json CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h.cpp
-	make -C CodeGenerators/Generate_CSS_PropertyID_h clean
-	make -C CodeGenerators/Generate_CSS_PropertyID_h
 	@echo "GENERATE $@"; CodeGenerators/Generate_CSS_PropertyID_h/Generate_CSS_PropertyID_h $< > $@
 
 CSS/PropertyID.cpp: CSS/Properties.json CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp.cpp
-	make -C CodeGenerators/Generate_CSS_PropertyID_cpp clean
-	make -C CodeGenerators/Generate_CSS_PropertyID_cpp
 	@echo "GENERATE $@"; CodeGenerators/Generate_CSS_PropertyID_cpp/Generate_CSS_PropertyID_cpp $< > $@
 
 %.o: %.cpp $(GENERATED_SOURCES)
@@ -94,8 +90,6 @@ CSS/PropertyID.cpp: CSS/Properties.json CodeGenerators/Generate_CSS_PropertyID_c
 -include $(OBJS:%.o=%.d)
 
 clean:
-	make -C CodeGenerators/Generate_CSS_PropertyID_h clean
-	make -C CodeGenerators/Generate_CSS_PropertyID_cpp clean
 	@echo "CLEAN"; rm -f $(LIBRARY) $(OBJS) *.d $(GENERATED_SOURCES)
 
 $(LIBRARY): $(GENERATED_SOURCES) $(LIBHTML_OBJS)