Index: branches/2.4.x/configure.in
===================================================================
--- branches/2.4.x/configure.in	(revision 1642475)
+++ branches/2.4.x/configure.in	(working copy)
@@ -774,7 +774,7 @@
 ],
 [
     case $host in
-    *freebsd[1234].*)
+    *freebsd[[1234]].*)
         v4mapped=yes
         ;;
     *freebsd*|*netbsd*|*openbsd*)
Index: trunk/configure.in
===================================================================
--- trunk/configure.in	(revision 1642475)
+++ trunk/configure.in	(working copy)
@@ -850,7 +850,7 @@
 ],
 [
     case $host in
-    *freebsd[1234].*)
+    *freebsd[[1234]].*)
         v4mapped=yes
         ;;
     *freebsd*|*netbsd*|*openbsd*)