diff --git a/ChangeLog b/ChangeLog
index a254f54bba..7afca8fd54 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2006-03-14  Tim-Philipp Müller  <tim at centricular dot net>
+
+	* libs/gst/base/gstbasesink.c: (gst_base_sink_get_sync_times):
+	  Can't use gst_segment_to_running_time() when the segment
+	  is not in GST_TIME_FORMAT (like with filesink, for example).
+	  Stops flac encoding pipelines from spewing critical warnings
+	  at EOS (#331248).
+	  
 2006-03-14  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* gst/gstpipeline.c: (gst_pipeline_class_init):
diff --git a/libs/gst/base/gstbasesink.c b/libs/gst/base/gstbasesink.c
index ae6d2bcb11..9127dbd8aa 100644
--- a/libs/gst/base/gstbasesink.c
+++ b/libs/gst/base/gstbasesink.c
@@ -767,11 +767,17 @@ gst_base_sink_get_sync_times (GstBaseSink * basesink, GstMiniObject * obj,
     }
   }
 
-  *start =
-      gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME, cstart);
-  *stop =
-      gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME, cstop);
-
+  if (G_LIKELY (basesink->segment.format == GST_FORMAT_TIME)) {
+    *start =
+        gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME,
+        cstart);
+    *stop =
+        gst_segment_to_running_time (&basesink->segment, GST_FORMAT_TIME,
+        cstop);
+  } else {
+    *start = -1;
+    *stop = -1;
+  }
   /* buffers always need syncing and preroll */
   return TRUE;