diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index 82abb602c8d..98834acb49f 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,7 @@
+2013-02-27  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* make_sunver.pl: Enforce C locale.
+
 2013-02-06  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* update-copyright.py: Add libdecnumber to the default list.
diff --git a/contrib/make_sunver.pl b/contrib/make_sunver.pl
index db0fe21ef43..8a90b1fea0d 100644
--- a/contrib/make_sunver.pl
+++ b/contrib/make_sunver.pl
@@ -19,6 +19,10 @@
 use FileHandle;
 use IPC::Open2;
 
+# Enforce C locale.
+$ENV{'LC_ALL'} = "C";
+$ENV{'LANG'} = "C";
+
 # Input version script, GNU style.
 my $symvers = shift;