diff --git a/sys/v4l2/gstv4l2src.c b/sys/v4l2/gstv4l2src.c
index dc1893a331..6281b188e2 100644
--- a/sys/v4l2/gstv4l2src.c
+++ b/sys/v4l2/gstv4l2src.c
@@ -22,7 +22,7 @@
  */
 
 /**
- * SECTION:element-v4l2srcsrc
+ * SECTION:element-v4l2src
  *
  * <refsect2>
  * v4l2src can be used to capture video from v4l2 devices, like webcams and tv cards.
diff --git a/sys/v4l2/gstv4l2src.h b/sys/v4l2/gstv4l2src.h
index 21b290de57..e862264661 100644
--- a/sys/v4l2/gstv4l2src.h
+++ b/sys/v4l2/gstv4l2src.h
@@ -68,10 +68,17 @@ struct _GstV4l2Buffer
   GstV4l2BufferPool *pool;
 };
 
+/**
+ * GstV4l2Src:
+ * @pushsrc: parent #GstPushSrc.
+ *
+ * Opaque object.
+ */
 struct _GstV4l2Src
 {
   GstPushSrc pushsrc;
 
+  /*< private >*/
   GstV4l2Object * v4l2object;
 
   /* pads */
diff --git a/sys/v4l2/gstv4l2vidorient.c b/sys/v4l2/gstv4l2vidorient.c
index 8f9c91af05..07ac412bb2 100644
--- a/sys/v4l2/gstv4l2vidorient.c
+++ b/sys/v4l2/gstv4l2vidorient.c
@@ -50,46 +50,46 @@ gst_v4l2_video_orientation_get_hflip (GstV4l2Object * v4l2object,
   return gst_v4l2_get_attribute (v4l2object, V4L2_CID_HFLIP, flip);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_get_vflip (GstV4l2Object * v4l2object,
     gboolean * flip)
 {
   return gst_v4l2_get_attribute (v4l2object, V4L2_CID_VFLIP, flip);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_get_hcenter (GstV4l2Object * v4l2object,
     gint * center)
 {
   return gst_v4l2_get_attribute (v4l2object, V4L2_CID_HCENTER, center);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_get_vcenter (GstV4l2Object * v4l2object,
     gint * center)
 {
   return gst_v4l2_get_attribute (v4l2object, V4L2_CID_VCENTER, center);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_set_hflip (GstV4l2Object * v4l2object, gboolean flip)
 {
   return gst_v4l2_set_attribute (v4l2object, V4L2_CID_HFLIP, flip);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_set_vflip (GstV4l2Object * v4l2object, gboolean flip)
 {
   return gst_v4l2_set_attribute (v4l2object, V4L2_CID_VFLIP, flip);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_set_hcenter (GstV4l2Object * v4l2object, gint center)
 {
   return gst_v4l2_set_attribute (v4l2object, V4L2_CID_HCENTER, center);
 }
 
-extern gboolean
+gboolean
 gst_v4l2_video_orientation_set_vcenter (GstV4l2Object * v4l2object, gint center)
 {
   return gst_v4l2_set_attribute (v4l2object, V4L2_CID_VCENTER, center);