diff --git a/uxnrepl b/uxnrepl
index d580530..a6e7cf5 100755
--- a/uxnrepl
+++ b/uxnrepl
@@ -39,17 +39,16 @@ template = '''
 @wst "wst 20 00
 '''
 
-_, tmp_tal = mkstemp(suffix='.tal', prefix='uxnrepl')
-_, tmp_rom = mkstemp(suffix='.rom', prefix='uxnrepl')
-
-def write_rom(s):
-    f = open(tmp_tal, 'w')
+def write_rom(path, s):
+    f = open(path, 'w')
     prog = template % s
     f.write(prog)
     f.close()
 
 def run(s):
-    write_rom(s)
+    _, tmp_tal = mkstemp(suffix='.tal', prefix='uxnrepl')
+    _, tmp_rom = mkstemp(suffix='.rom', prefix='uxnrepl')
+    write_rom(tmp_tal, s)
     res = system('uxnasm %s %s 2>/dev/null' % (tmp_tal, tmp_rom))
     if res != 0:
         system('uxnasm %s %s' % (tmp_tal, tmp_rom))