diff --git a/Doc/tools/mkinfo b/Doc/tools/mkinfo
index 64fb86e42b2..65add7c730f 100755
--- a/Doc/tools/mkinfo
+++ b/Doc/tools/mkinfo
@@ -7,7 +7,6 @@
 #
 #  Written by Fred L. Drake, Jr. <fdrake@acm.org>
 
-PERL=${PERL:-perl}
 EMACS=${EMACS:-emacs}
 MAKEINFO=${MAKEINFO:-makeinfo}