diff --git a/gst-libs/gst/app/gstappsink.h b/gst-libs/gst/app/gstappsink.h
index c0e86c6cbd..452e3686d8 100644
--- a/gst-libs/gst/app/gstappsink.h
+++ b/gst-libs/gst/app/gstappsink.h
@@ -61,9 +61,9 @@ typedef struct _GstAppSinkPrivate GstAppSinkPrivate;
  * gst_app_sink_set_callbacks().
  */
 typedef struct {
-  void          (*eos)              (GstAppSink *sink, gpointer user_data);
-  GstFlowReturn (*new_preroll)      (GstAppSink *sink, gpointer user_data);
-  GstFlowReturn (*new_sample)       (GstAppSink *sink, gpointer user_data);
+  void          (*eos)              (GstAppSink *appsink, gpointer user_data);
+  GstFlowReturn (*new_preroll)      (GstAppSink *appsink, gpointer user_data);
+  GstFlowReturn (*new_sample)       (GstAppSink *appsink, gpointer user_data);
 
   /*< private >*/
   gpointer     _gst_reserved[GST_PADDING];
@@ -85,13 +85,13 @@ struct _GstAppSinkClass
   GstBaseSinkClass basesink_class;
 
   /* signals */
-  void        (*eos)              (GstAppSink *sink);
-  void        (*new_preroll)      (GstAppSink *sink);
-  void        (*new_sample)       (GstAppSink *sink);
+  void        (*eos)              (GstAppSink *appsink);
+  void        (*new_preroll)      (GstAppSink *appsink);
+  void        (*new_sample)       (GstAppSink *appsink);
 
   /* actions */
-  GstSample     * (*pull_preroll)      (GstAppSink *sink);
-  GstSample     * (*pull_sample)       (GstAppSink *sink);
+  GstSample     * (*pull_preroll)      (GstAppSink *appsink);
+  GstSample     * (*pull_sample)       (GstAppSink *appsink);
 
   /*< private >*/
   gpointer     _gst_reserved[GST_PADDING];
diff --git a/gst-libs/gst/app/gstappsrc.h b/gst-libs/gst/app/gstappsrc.h
index 79e2791b0a..3cc9447cad 100644
--- a/gst-libs/gst/app/gstappsrc.h
+++ b/gst-libs/gst/app/gstappsrc.h
@@ -100,13 +100,13 @@ struct _GstAppSrcClass
   GstBaseSrcClass basesrc_class;
 
   /* signals */
-  void          (*need_data)       (GstAppSrc *src, guint length);
-  void          (*enough_data)     (GstAppSrc *src);
-  gboolean      (*seek_data)       (GstAppSrc *src, guint64 offset);
+  void          (*need_data)       (GstAppSrc *appsrc, guint length);
+  void          (*enough_data)     (GstAppSrc *appsrc);
+  gboolean      (*seek_data)       (GstAppSrc *appsrc, guint64 offset);
 
   /* actions */
-  GstFlowReturn (*push_buffer)     (GstAppSrc *src, GstBuffer *buffer);
-  GstFlowReturn (*end_of_stream)   (GstAppSrc *src);
+  GstFlowReturn (*push_buffer)     (GstAppSrc *appsrc, GstBuffer *buffer);
+  GstFlowReturn (*end_of_stream)   (GstAppSrc *appsrc);
 
   /*< private >*/
   gpointer     _gst_reserved[GST_PADDING];