diff --git a/m4/check-package.m4 b/m4/check-package.m4
index 527205bf1b1d8f26b23202f3e8a943f702475494..c01437dbe9c25e403f589a344f4e4629e4ce5d72 100644
--- a/m4/check-package.m4
+++ b/m4/check-package.m4
@@ -21,7 +21,7 @@ else
 fi
 AC_ARG_WITH($1-lib,
 [  --with-$1-lib=DIR   use $1 library below directory DIR
-                      (default: $DEFAULT_LIBDIR)],
+                      (default: `eval $DEFAULT_LIBDIR`)],
 [case "$withval" in
     yes) AC_MSG_ERROR("option \"--with-$1-lib\" requires an argument")
 	;;
@@ -47,7 +47,7 @@ AC_ARG_WITH($1-headers,
 	;;
     no) AC_MSG_ERROR("option \"--with-$1-headers\" requires an argument")
 	;;
-    *) $1_INCS=$withval
+    *) $1_INCLUDE_PATH=$withval
 	;;
 esac],
 $1_INCLUDE_PATH=$DEFAULT_INCDIR)