--- a/fixincludes/check.tpl
+++ b/fixincludes/check.tpl
@@ -85,11 +85,8 @@ FOR fix  =][=
                         (get "hackname") )) )
          =][=
   ELSE   =]
-cat >> [=
-    IF (exist? "files") =][=
-      files[0] =][=
-    ELSE =]testing.h[=
-    ENDIF =] <<_HACK_EOF_
+cat >> [= (raw-shell-str (if (exist? "files") (get "files[0]") "testing.h"))
+         =] <<_HACK_EOF_
 
 
 #if defined( [=(. HACK)=]_CHECK )