diff --git a/aclocal.m4 b/aclocal.m4
index 481f1b3fe..a27fddcb5 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -31,7 +31,9 @@ AC_SUBST(ident_support)
 # different builds. Remember to change the default suffix string to some
 # value appropriate for the current version.
 AC_DEFUN([AX_ENABLE_SUFFIX],
-[AC_ARG_ENABLE([suffix],[Set the installation command suffix],[true],[enable_suffix=yes])
+[AC_ARG_ENABLE([suffix],[AC_HELP_STRING([--enable-suffix],
+                                        [Use/set the installation command suffix])],
+               [true],[enable_suffix=yes])
 if test X$enable_suffix = Xyes; then
   install_suffix='-0.8'
 elif test X$enable_suffix = Xno; then