diff --git a/src/examples/export-sink.c b/src/examples/export-sink.c
index ffdb0e19c..2a9b34bed 100644
--- a/src/examples/export-sink.c
+++ b/src/examples/export-sink.c
@@ -408,7 +408,7 @@ static int impl_node_process_input(void *data)
 	SDL_RenderPresent(d->renderer);
 
 	if (map)
-		munmap(map, buf->datas[0].maxsize);
+		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
 
 	handle_events(d);
 
diff --git a/src/examples/local-v4l2.c b/src/examples/local-v4l2.c
index 512cd2b85..79b340b9f 100644
--- a/src/examples/local-v4l2.c
+++ b/src/examples/local-v4l2.c
@@ -389,7 +389,7 @@ static int impl_node_process_input(void *data)
 	SDL_RenderPresent(d->renderer);
 
 	if (map)
-		munmap(map, buf->datas[0].maxsize);
+		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
 
 	handle_events(d);
 
diff --git a/src/examples/video-play.c b/src/examples/video-play.c
index 430bd7736..5e8c5206b 100644
--- a/src/examples/video-play.c
+++ b/src/examples/video-play.c
@@ -142,7 +142,7 @@ on_stream_new_buffer(void *_data, uint32_t id)
 	SDL_RenderPresent(data->renderer);
 
 	if (map)
-		munmap(map, buf->datas[0].maxsize);
+		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
 
 	pw_stream_recycle_buffer(stream, id);