diff --git a/spa/examples/local-libcamera.c b/spa/examples/local-libcamera.c
index f91d2db68..2a4d8283d 100644
--- a/spa/examples/local-libcamera.c
+++ b/spa/examples/local-libcamera.c
@@ -190,11 +190,11 @@ static int on_source_ready(void *_data, int status)
 		sdata = datas[0].data;
 		if (datas[0].type == SPA_DATA_MemFd ||
 		    datas[0].type == SPA_DATA_DmaBuf) {
-			map = mmap(NULL, datas[0].maxsize + datas[0].mapoffset, PROT_READ,
-				   MAP_PRIVATE, datas[0].fd, 0);
+			map = mmap(NULL, datas[0].maxsize, PROT_READ,
+				   MAP_PRIVATE, datas[0].fd, datas[0].mapoffset);
 			if (map == MAP_FAILED)
 				return -errno;
-			sdata = SPA_PTROFF(map, datas[0].mapoffset, uint8_t);
+			sdata = map;
 		} else if (datas[0].type == SPA_DATA_MemPtr) {
 			map = NULL;
 			sdata = datas[0].data;
@@ -215,7 +215,7 @@ static int on_source_ready(void *_data, int status)
 		SDL_RenderPresent(data->renderer);
 
 		if (map)
-			munmap(map, datas[0].maxsize + datas[0].mapoffset);
+			munmap(map, datas[0].maxsize);
 	}
 
 	if ((res = spa_node_process(data->source)) < 0)
diff --git a/spa/examples/local-v4l2.c b/spa/examples/local-v4l2.c
index 7febebb4f..4e7000da3 100644
--- a/spa/examples/local-v4l2.c
+++ b/spa/examples/local-v4l2.c
@@ -185,11 +185,11 @@ static int on_source_ready(void *_data, int status)
 		sdata = datas[0].data;
 		if (datas[0].type == SPA_DATA_MemFd ||
 		    datas[0].type == SPA_DATA_DmaBuf) {
-			map = mmap(NULL, datas[0].maxsize + datas[0].mapoffset, PROT_READ,
-				   MAP_PRIVATE, datas[0].fd, 0);
+			map = mmap(NULL, datas[0].maxsize, PROT_READ,
+				   MAP_PRIVATE, datas[0].fd, datas[0].mapoffset);
 			if (map == MAP_FAILED)
 				return -errno;
-			sdata = SPA_PTROFF(map, datas[0].mapoffset, uint8_t);
+			sdata = map;
 		} else if (datas[0].type == SPA_DATA_MemPtr) {
 			map = NULL;
 			sdata = datas[0].data;
@@ -210,7 +210,7 @@ static int on_source_ready(void *_data, int status)
 		SDL_RenderPresent(data->renderer);
 
 		if (map)
-			munmap(map, datas[0].maxsize + datas[0].mapoffset);
+			munmap(map, datas[0].maxsize);
 	}
 
 	if ((res = spa_node_process(data->source)) < 0)
diff --git a/src/examples/export-sink.c b/src/examples/export-sink.c
index 76420861f..be1e39689 100644
--- a/src/examples/export-sink.c
+++ b/src/examples/export-sink.c
@@ -369,9 +369,9 @@ static int do_render(struct spa_loop *loop, bool async, uint32_t seq,
 
 	if (buf->datas[0].type == SPA_DATA_MemFd ||
 	    buf->datas[0].type == SPA_DATA_DmaBuf) {
-		map = mmap(NULL, buf->datas[0].maxsize + buf->datas[0].mapoffset, PROT_READ,
-			   MAP_PRIVATE, buf->datas[0].fd, 0);
-		sdata = SPA_PTROFF(map, buf->datas[0].mapoffset, uint8_t);
+		map = mmap(NULL, buf->datas[0].maxsize, PROT_READ,
+			   MAP_PRIVATE, buf->datas[0].fd, buf->datas[0].mapoffset);
+		sdata = map;
 	} else if (buf->datas[0].type == SPA_DATA_MemPtr) {
 		map = NULL;
 		sdata = buf->datas[0].data;
@@ -413,7 +413,7 @@ static int do_render(struct spa_loop *loop, bool async, uint32_t seq,
 	SDL_RenderPresent(d->renderer);
 
 	if (map)
-		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
+		munmap(map, buf->datas[0].maxsize);
 
 	return 0;
 }
diff --git a/src/examples/export-source.c b/src/examples/export-source.c
index b266a53c8..54e1fc332 100644
--- a/src/examples/export-source.c
+++ b/src/examples/export-source.c
@@ -319,14 +319,13 @@ static int impl_port_use_buffers(void *object,
 		}
 		else if (datas[0].type == SPA_DATA_MemFd ||
 			 datas[0].type == SPA_DATA_DmaBuf) {
-			b->ptr = mmap(NULL, datas[0].maxsize + datas[0].mapoffset, PROT_WRITE,
-				      MAP_SHARED, datas[0].fd, 0);
+			b->ptr = mmap(NULL, datas[0].maxsize, PROT_WRITE,
+				      MAP_SHARED, datas[0].fd, datas[0].mapoffset);
 			if (b->ptr == MAP_FAILED) {
 				pw_log_error("failed to buffer mem");
 				return -errno;
 
 			}
-			b->ptr = SPA_PTROFF(b->ptr, datas[0].mapoffset, void);
 			b->mapped = true;
 		}
 		else {
diff --git a/src/examples/local-v4l2.c b/src/examples/local-v4l2.c
index db8bda0e3..b8ce37fa6 100644
--- a/src/examples/local-v4l2.c
+++ b/src/examples/local-v4l2.c
@@ -269,9 +269,9 @@ static int do_render(struct spa_loop *loop, bool async, uint32_t seq,
 
 	if (buf->datas[0].type == SPA_DATA_MemFd ||
 	    buf->datas[0].type == SPA_DATA_DmaBuf) {
-		map = mmap(NULL, buf->datas[0].maxsize + buf->datas[0].mapoffset, PROT_READ,
-			   MAP_PRIVATE, buf->datas[0].fd, 0);
-		sdata = SPA_PTROFF(map, buf->datas[0].mapoffset, uint8_t);
+		map = mmap(NULL, buf->datas[0].maxsize, PROT_READ,
+			   MAP_PRIVATE, buf->datas[0].fd, buf->datas[0].mapoffset);
+		sdata = map;
 	} else if (buf->datas[0].type == SPA_DATA_MemPtr) {
 		map = NULL;
 		sdata = buf->datas[0].data;
@@ -299,7 +299,7 @@ static int do_render(struct spa_loop *loop, bool async, uint32_t seq,
 	SDL_RenderPresent(d->renderer);
 
 	if (map)
-		munmap(map, buf->datas[0].maxsize + buf->datas[0].mapoffset);
+		munmap(map, buf->datas[0].maxsize);
 
 	return 0;
 }