diff --git a/implementations/uvm-ncc/GNUmakefile b/implementations/uvm-ncc/GNUmakefile
index 06b9247..aa43115 100644
--- a/implementations/uvm-ncc/GNUmakefile
+++ b/implementations/uvm-ncc/GNUmakefile
@@ -7,8 +7,11 @@ UVM_VM=$(UVM)/vm
 run: $(UVM_NCC)/out.asm
 	cd $(UVM_VM) ; cargo run $(UVM_NCC)/out.asm
 
-$(UVM_NCC)/out.asm: $(UVM_JOY)/xerblin.c
+$(UVM_NCC)/out.asm: $(UVM_JOY)/xerblin.c $(UVM_JOY)/font/font.h
 	cd $(UVM_NCC) ; cargo run $(UVM_JOY)/xerblin.c
 
+$(UVM_JOY)/font/font.h:
+	gmake -C $(UVM_JOY)/font
+
 clean:
 	$(RM) $(UVM_NCC)/out.asm
diff --git a/implementations/uvm-ncc/font/convert.py b/implementations/uvm-ncc/font/convert.py
index cedf60c..e89a0cd 100644
--- a/implementations/uvm-ncc/font/convert.py
+++ b/implementations/uvm-ncc/font/convert.py
@@ -24,7 +24,7 @@ int font_height = {h};
 u32 font_data[{len(txt)}][{w * h}];
 
 void
-init_font_data(void)
+init_font_data()
 {{
 \tmemset(font_data, 0, {4 * len(txt) * w * h});
 ''')