diff --git a/configure b/configure
index 4ad0545..e17c071 100755
--- a/configure
+++ b/configure
@@ -8703,7 +8703,7 @@ echo "${ECHO_T}no" >&6
   exit 1
 fi
 gentoo_lt_version="1.5.10"
-gentoo_ltmain_version=`grep '^[:space:]*VERSION=' $ltmain | sed -e 's|^[:space:]*VERSION=||'`
+gentoo_ltmain_version=`grep '^[[:space:]]*VERSION=' $ltmain | sed -e 's|^[:space:]*VERSION=||'`
 if test "$gentoo_lt_version" != "$gentoo_ltmain_version"; then
   echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6