diff --git a/guess-rev.sh b/guess-rev.sh
index 15cfff400..bd9a4a753 100755
--- a/guess-rev.sh
+++ b/guess-rev.sh
@@ -2,7 +2,7 @@
 
 REV=unknown
 
-which svnversion > /dev/null 2>&1 && REV=`svnversion`
+which svnversion > /dev/null 2>&1 && REV=`svnversion -n`
 
 echo -n $REV