diff --git a/configure b/configure
index 315bcd0..e659370 100755
--- a/configure
+++ b/configure
@@ -58,7 +58,7 @@ for arg
 do
     case "$arg" in
     --disable-*)
-        arg="--enable-${arg%--disable-}=no"
+        arg="--enable-${arg#--disable-}=no"
 	;;
     esac
     case "$arg" in