diff --git a/configure.ac b/configure.ac
index b9366b6c3a620aa6c735474a40f9ff7faba9c980..587f0a507fc47e5b1a74022e94a36ea56f93ff7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -270,7 +270,7 @@ AS_IF([test -n "${CONTRIB_DIR}"],
     [CONTRIB_DIR=`cd "${CONTRIB_DIR}" && pwd`],
     [echo "${CONTRIB_DIR}/lib not found" >&AS_MESSAGE_LOG_FD
      CONTRIB_DIR=""
-     AC_MSG_RESULT([not usable])])])
+     AC_MSG_RESULT([unusable])])])
 
 AS_IF([test -n "${CONTRIB_DIR}"],
   [AC_MSG_RESULT([${CONTRIB_DIR}])