diff --git a/configure b/configure
index b507da973788c325af01391aa871641cc1a2a004..7943255d6a2682798158a7d4d529ffc07167d876 100755
--- a/configure
+++ b/configure
@@ -74,7 +74,7 @@ if [ $# -lt 1 ] ; then
 else
    case $1 in
    -h|--help) confhelp ; exit 0 ;;
-   *) if `grep "^$1" $ARCHS >/dev/null 2>&1` ; then
+   *) if `grep "^$1 " $ARCHS >/dev/null 2>&1` ; then
          arch=$1
          echo "Configuring for $arch"
          shift