diff --git a/acconfig.h b/acconfig.h
index 8b954380..9da7413a 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -155,3 +155,7 @@
  * the running kernel (if we don't have configured kernel sources).
  */
 #undef GLIBTOP_LINUX_VERSION_CODE
+
+/* Define if you want to use LibGTop without GNOME. */
+#undef WITHOUT_GNOME
+
diff --git a/configure.in b/configure.in
index d6500fbc..196ed339 100644
--- a/configure.in
+++ b/configure.in
@@ -82,6 +82,8 @@ if test "x$gnome_found" != xyes; then
 *** If you want to use LibGTop without GNOME, you need
 *** to give configure the --without-gnome parameter.
 ])
+  else
+    AC_DEFINE(WITHOUT_GNOME)
   fi
   GNOME_SUPPORT_CHECKS
 else