diff --git a/src/configure.in b/src/configure.in
index 94a1242167a4c943f313f43f0f12b458be9c9aa8..3e6e5fb8c13f452533bc5bb3262788bb88b723a7 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -94,7 +94,7 @@ AC_ARG_WITH(template,
     [
 
 # lowercase $host
-host="`echo $host | tr '[A-Z]' '[a-z]'`"
+host="`echo $host | tr 'A-Z' 'a-z'`"
 
 # First, try for a template exactly matching $host
 if test -f "template/$host"