diff --git a/ChangeLog b/ChangeLog
index 7969c1d0ea..8f7f398ab0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2005-04-06  Andy Wingo  <wingo@pobox.com>
+
+	* configure.ac: Add check and AC_SUBST for libgstbase.
+
 2005-03-31  Wim Taymans  <wim@fluendo.com>
 
 	* examples/seeking/Makefile.am:
diff --git a/configure.ac b/configure.ac
index a45fc07f3c..48d2ff2b47 100644
--- a/configure.ac
+++ b/configure.ac
@@ -213,7 +213,7 @@ GST_CHECK_FEATURE(GCONF, [GConf libraries], , [
 
 dnl check for gstreamer
 dnl uninstalled is selected preferentially -- see pkg-config(1)
-GST_REQ=0.8.90.1
+GST_REQ=0.9.0
 PKG_CHECK_MODULES(GST, gstreamer-$GST_MAJORMINOR >= $GST_REQ,
   HAVE_GST="yes", HAVE_GST="no")
 
@@ -237,6 +237,15 @@ fi
 
 AC_SUBST(GST_CONTROL_LIBS)
 
+PKG_CHECK_MODULES(GST_BASE, gstreamer-base-$GST_MAJORMINOR >= $GST_REQ,
+  HAVE_GST_BASE="yes", HAVE_GST_BASE="no")
+
+if test "x$HAVE_GST_BASE" = "xno"; then
+  AC_MSG_ERROR(no libgstbase found)
+fi
+
+AC_SUBST(GST_BASE_LIBS)
+
 dnl Determine endianness
 AC_C_BIGENDIAN