diff --git a/gst-libs/gst/pbutils/encoding-target.h b/gst-libs/gst/pbutils/encoding-target.h
index 0c3a39c808..3eba8ad37c 100644
--- a/gst-libs/gst/pbutils/encoding-target.h
+++ b/gst-libs/gst/pbutils/encoding-target.h
@@ -71,6 +71,17 @@ G_BEGIN_DECLS
  */
 #define GST_ENCODING_CATEGORY_CAPTURE           "capture"
 
+/**
+ * GST_ENCODING_CATEGORY_FILE_EXTENSION:
+ *
+ * #GstEncodingTarget category for file extensions.
+ * The name of the target will be the name of the file extensions possible
+ * for a particular target. Those targets are defining like 'default' formats
+ * usually used for a particular file extension.
+ */
+
+#define GST_ENCODING_CATEGORY_FILE_EXTENSION    "file-extension"
+
 /**
  * GstEncodingTarget:
  *