diff --git a/examples/tutorials/playback-tutorial-3.c b/examples/tutorials/playback-tutorial-3.c
index cea556fd1f..0362dc9b5f 100644
--- a/examples/tutorials/playback-tutorial-3.c
+++ b/examples/tutorials/playback-tutorial-3.c
@@ -36,7 +36,7 @@ static gboolean push_data (CustomData *data) {
 
   /* Set its timestamp and duration */
   GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
+  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (num_samples, GST_SECOND, SAMPLE_RATE);
 
   /* Generate some psychodelic waveforms */
   gst_buffer_map (buffer, &map, GST_MAP_WRITE);
diff --git a/markdown/tutorials/basic/short-cutting-the-pipeline.md b/markdown/tutorials/basic/short-cutting-the-pipeline.md
index 0c5fcf3ba9..855d4e1890 100644
--- a/markdown/tutorials/basic/short-cutting-the-pipeline.md
+++ b/markdown/tutorials/basic/short-cutting-the-pipeline.md
@@ -131,7 +131,7 @@ static gboolean push_data (CustomData *data) {
 
   /* Set its timestamp and duration */
   GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
+  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (num_samples, GST_SECOND, SAMPLE_RATE);
 
   /* Generate some psychodelic waveforms */
   gst_buffer_map (buffer, &map, GST_MAP_WRITE);
@@ -450,7 +450,7 @@ static gboolean push_data (CustomData *data) {
 
   /* Set its timestamp and duration */
   GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
+  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (num_samples, GST_SECOND, SAMPLE_RATE);
 
   /* Generate some psychodelic waveforms */
   raw = (gint16 *)GST_BUFFER_DATA (buffer);
diff --git a/markdown/tutorials/playback/short-cutting-the-pipeline.md b/markdown/tutorials/playback/short-cutting-the-pipeline.md
index 00f6803eff..cf37b459f8 100644
--- a/markdown/tutorials/playback/short-cutting-the-pipeline.md
+++ b/markdown/tutorials/playback/short-cutting-the-pipeline.md
@@ -57,7 +57,7 @@ static gboolean push_data (CustomData *data) {
 
   /* Set its timestamp and duration */
   GST_BUFFER_TIMESTAMP (buffer) = gst_util_uint64_scale (data->num_samples, GST_SECOND, SAMPLE_RATE);
-  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (CHUNK_SIZE, GST_SECOND, SAMPLE_RATE);
+  GST_BUFFER_DURATION (buffer) = gst_util_uint64_scale (num_samples, GST_SECOND, SAMPLE_RATE);
 
   /* Generate some psychodelic waveforms */
   gst_buffer_map (buffer, &map, GST_MAP_WRITE);