diff --git a/ka/usr/cmd-exec.k b/ka/usr/cmd-exec.k
index ee0afdd..5896721 100644
--- a/ka/usr/cmd-exec.k
+++ b/ka/usr/cmd-exec.k
@@ -26,7 +26,7 @@
     trap 0
 
     ; we good?
-    blte 0, eax, .do_exec
+    blte zero, eax, .do_exec
 
     nul b[esi]    ; erase ".com"
     jmp .exec_not_found
diff --git a/vm/Makefile b/vm/Makefile
index 428a06e..b16cc6c 100644
--- a/vm/Makefile
+++ b/vm/Makefile
@@ -50,8 +50,8 @@ ob/instrs.lst: in/arch_i.py
 	@cd in && python3 arch_i.py
 
 clean:
-	@rm -f $(OBJDIR)/*/*.o ob/arch_i.h ob/instrs.lst
-	@rm -f $(OBJDIR)/*/*.d
+	@rm -f ob/*/*.o ob/arch_i.h ob/instrs.lst
+	@rm -f ob/*/*.d ob/*.k
 
 $(KEXE): ob/instrs.lst $(obj)
 	@gcc -O2 -lSDL2 -lSDL2_ttf -Wall $(obj) -o $(KEXE)
diff --git a/vm/ob/command.k b/vm/ob/command.k
index 29f5544..67f8f96 100644
--- a/vm/ob/command.k
+++ b/vm/ob/command.k
@@ -1395,7 +1395,7 @@ main:
     trap 0
 
     ; we good?
-    blte 0, eax, .do_exec
+    blte zero, eax, .do_exec
 
     nul b[esi] ; erase ".com"
     jmp .exec_not_found