diff --git a/ext/amrnb/amrnbdec.c b/ext/amrnb/amrnbdec.c
index c5f2774c0e..906cb26efb 100644
--- a/ext/amrnb/amrnbdec.c
+++ b/ext/amrnb/amrnbdec.c
@@ -23,7 +23,7 @@
  * @see_also: #GstAmrnbEnc, #GstAmrParse
  *
  * AMR narrowband decoder based on the
- * <ulink url="http://sourceforge.net/projects/opencore-amr">opencore codec implementation</ulink>.
+ * [opencore codec implementation](http://sourceforge.net/projects/opencore-amr).
  *
  * ## Example launch line
  * |[
diff --git a/ext/amrnb/amrnbenc.c b/ext/amrnb/amrnbenc.c
index 9c0f28560f..06c2a86216 100644
--- a/ext/amrnb/amrnbenc.c
+++ b/ext/amrnb/amrnbenc.c
@@ -23,7 +23,7 @@
  * @see_also: #GstAmrnbDec, #GstAmrnbParse
  *
  * AMR narrowband encoder based on the
- * <ulink url="http://sourceforge.net/projects/opencore-amr">opencore codec implementation</ulink>.
+ * [opencore codec implementation](http://sourceforge.net/projects/opencore-amr).
  *
  * ## Example launch line
  * |[
diff --git a/ext/amrwbdec/amrwbdec.c b/ext/amrwbdec/amrwbdec.c
index 7832036c54..d482b989ed 100644
--- a/ext/amrwbdec/amrwbdec.c
+++ b/ext/amrwbdec/amrwbdec.c
@@ -23,7 +23,7 @@
  * @see_also: #GstAmrwbEnc
  *
  * AMR wideband decoder based on the
- * <ulink url="http://sourceforge.net/projects/opencore-amr">opencore codec implementation</ulink>.
+ * [opencore codec implementation](http://sourceforge.net/projects/opencore-amr).
  *
  * ## Example launch line
  * |[