diff --git a/configure.ac b/configure.ac
index 17825f0304..2a4a57d799 100644
--- a/configure.ac
+++ b/configure.ac
@@ -384,7 +384,7 @@ else
         target_os=darwin
       ;;
       *)
-        target_os=`echo $host_os | sed 's/-gnu//'`
+        target_os=`echo $host_os | sed 's/-gnu.*//'`
       ;;
   esac