diff --git a/ChangeLog b/ChangeLog
index eec8dca444..6006bb659d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-05-07  Tim-Philipp Müller  <tim.muller at collabora co uk>
+
+	* configure.ac:
+	  Error out if we don't have the required core/base versions.
+
 2008-05-06  Wim Taymans  <wim.taymans@collabora.co.uk>
 
 	* gst/realmedia/rmdemux.c: (gst_rmdemux_parse_mdpr),
diff --git a/configure.ac b/configure.ac
index 547823a3c8..1b844d359b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -156,10 +156,10 @@ fi
 
 dnl checks for gstreamer
 dnl uninstalled is selected preferentially -- see pkg-config(1)
-AG_GST_CHECK_GST($GST_MAJORMINOR, [$GST_REQ])
-AG_GST_CHECK_GST_BASE($GST_MAJORMINOR, [$GST_REQ])
+AG_GST_CHECK_GST($GST_MAJORMINOR, [$GST_REQ], yes)
+AG_GST_CHECK_GST_BASE($GST_MAJORMINOR, [$GST_REQ], yes)
 AG_GST_CHECK_GST_CHECK($GST_MAJORMINOR, [$GST_REQ], no)
-AG_GST_CHECK_GST_PLUGINS_BASE($GST_MAJORMINOR, [$GSTPB_REQ])
+AG_GST_CHECK_GST_PLUGINS_BASE($GST_MAJORMINOR, [$GSTPB_REQ], yes)
 AM_CONDITIONAL(HAVE_GST_CHECK, test "x$HAVE_GST_CHECK" = "xyes")
 
 dnl Check for documentation xrefs