diff --git a/src/examples/audio-dsp-sink.c b/src/examples/audio-dsp-sink.c
index 3f18adb66..caaac3b66 100644
--- a/src/examples/audio-dsp-sink.c
+++ b/src/examples/audio-dsp-sink.c
@@ -87,7 +87,6 @@ static void on_remove_buffer(void *_data, void *_port_data, struct pw_buffer *bu
 	d = buf->datas;
 	pw_log_info("remove buffer %p", buffer);
 
-	munmap(d[0].data, d[0].maxsize);
 	close(d[0].fd);
 }
 
@@ -127,13 +126,6 @@ static void on_add_buffer(void *_data, void *_port_data, struct pw_buffer *buffe
 		pw_log_error("can't truncate to %d: %m", d[0].maxsize);
 		return;
 	}
-	/* now mmap so we can read it in the process function above */
-	d[0].data = mmap(NULL, d[0].maxsize, PROT_READ | PROT_WRITE,
-			MAP_SHARED, d[0].fd, d[0].mapoffset);
-	if (d[0].data == MAP_FAILED) {
-		pw_log_error("can't mmap memory: %m");
-		return;
-	}
 }
 #endif