diff --git a/configure b/configure
index 3ad96af2..b2109cc6 100755
--- a/configure
+++ b/configure
@@ -15,7 +15,7 @@ get_optval(){
     local ret
     case "$1" in
         --*=?*)
-            echo "${1:9}"
+            echo "${1}" |cut -d '=' -f 2-
             ret=0
             ;;
         *)