diff --git a/ChangeLog b/ChangeLog
index c4856188ba..ed5dd7da59 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2008-03-03  Tim-Philipp Müller  <tim at centricular dot net>
+
+	* configure.ac:
+	* gst/gstconfig.h.in:
+	* gst/gstregistry.h:
+	  Fix broken use of config.h-defined preprocessor directive in a public
+	  header file. Add a corresponding define to gstconfig.h, since we can't
+	  really remove those function declarations from the header file now
+	  (or can we? and why are they there in the first place?).
+
 2008-03-03  Andy Wingo  <wingo@pobox.com>
 
 	* tests/check/gst/gststructure.c (GST_START_TEST): Add a check for
diff --git a/common b/common
index 8ede243026..668c3f0b72 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 8ede243026af26e496d775b46ded7988ce883080
+Subproject commit 668c3f0b72d50813c30eb04be7048f638037c571
diff --git a/configure.ac b/configure.ac
index e54883eba8..cef322cfd0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -193,11 +193,18 @@ AC_ARG_ENABLE(binary-registry,
     esac
   ],
   [USE_BINARY_REGISTRY=no]) dnl Default value
+
 if test "x$USE_BINARY_REGISTRY" = xyes; then
+  dnl for gstconfig.h:
+  GST_USING_BINARY_REGISTRY_DEFINE="#define GST_USING_BINARY_REGISTRY"
+  dnl for config.h:
   AC_DEFINE(USE_BINARY_REGISTRY, 1,
     [Define if we should use binary registry instead xml registry])
+else
+  GST_USING_BINARY_REGISTRY_DEFINE="#undef GST_USING_BINARY_REGISTRY"
 fi
 AM_CONDITIONAL(USE_BINARY_REGISTRY, test "x$USE_BINARY_REGISTRY" = "xyes")
+AC_SUBST(GST_USING_BINARY_REGISTRY_DEFINE)
 
 dnl *** checks for platform ***
 
diff --git a/gst/gstconfig.h.in b/gst/gstconfig.h.in
index 85084c6789..b886b20d27 100644
--- a/gst/gstconfig.h.in
+++ b/gst/gstconfig.h.in
@@ -120,10 +120,12 @@
  *
  * Configures the use of the plugin registry.
  * If one disables this, required plugins need to be loaded and registered
- * manualy
+ * manually
  */
 @GST_DISABLE_REGISTRY_DEFINE@
 
+@GST_USING_BINARY_REGISTRY_DEFINE@
+
 /**
  * GST_DISABLE_XML:
  *
diff --git a/gst/gstregistry.h b/gst/gstregistry.h
index 4e7feb425e..00a518e0e8 100644
--- a/gst/gstregistry.h
+++ b/gst/gstregistry.h
@@ -110,7 +110,8 @@ GstPluginFeature*	gst_registry_find_feature	(GstRegistry *registry, const gchar
 GstPlugin * 		gst_registry_lookup 		(GstRegistry *registry, const char *filename);
 GstPluginFeature * 	gst_registry_lookup_feature 	(GstRegistry *registry, const char *name);
 
-#ifdef USE_BINARY_REGISTRY
+/* FIXME 0.11: do we really want to export these? (If yes, we should add a GError argument) */
+#ifdef GST_USING_BINARY_REGISTRY
 gboolean 		gst_registry_binary_read_cache 	(GstRegistry * registry, const char *location);
 gboolean 		gst_registry_binary_write_cache	(GstRegistry * registry, const char *location);
 #else