diff --git a/pipewire-jack b/pipewire-jack
index 2736c227a..35bf6bfa5 160000
--- a/pipewire-jack
+++ b/pipewire-jack
@@ -1 +1 @@
-Subproject commit 2736c227a19b1db48dd849af6f7f3e929bb53c00
+Subproject commit 35bf6bfa5c3969b65e63dbfe48578c5c040849d4
diff --git a/src/pipewire/mem.c b/src/pipewire/mem.c
index e681eab9f..2422582ec 100644
--- a/src/pipewire/mem.c
+++ b/src/pipewire/mem.c
@@ -266,13 +266,18 @@ static struct mapping * memblock_map(struct memblock *b,
 	struct mempool *p = SPA_CONTAINER_OF(b->this.pool, struct mempool, this);
 	struct mapping *m;
 	void *ptr;
-	int prot = 0;
+	int prot = 0, fl = 0;
 
 	if (flags & PW_MEMMAP_FLAG_READ)
 		prot |= PROT_READ;
 	if (flags & PW_MEMMAP_FLAG_WRITE)
 		prot |= PROT_WRITE;
 
+	if (flags & PW_MEMMAP_FLAG_PRIVATE)
+		fl |= MAP_PRIVATE;
+	else
+		fl |= MAP_SHARED;
+
 	if (flags & PW_MEMMAP_FLAG_TWICE) {
 		pw_log_error(NAME" %p: implement me PW_MEMMAP_FLAG_TWICE", p);
 		errno = ENOTSUP;
@@ -280,7 +285,7 @@ static struct mapping * memblock_map(struct memblock *b,
 	}
 
 
-	ptr = mmap(NULL, size, prot, MAP_SHARED, b->this.fd, offset);
+	ptr = mmap(NULL, size, prot, fl, b->this.fd, offset);
 	if (ptr == MAP_FAILED) {
 		pw_log_error(NAME" %p: Failed to mmap memory fd:%d offset:%u size:%u: %m",
 				p, b->this.fd, offset, size);
diff --git a/src/pipewire/mem.h b/src/pipewire/mem.h
index 7109d616c..5d3946780 100644
--- a/src/pipewire/mem.h
+++ b/src/pipewire/mem.h
@@ -49,6 +49,7 @@ enum pw_memmap_flags {
 	PW_MEMMAP_FLAG_WRITE = (1 << 1),	/**< map in write mode */
 	PW_MEMMAP_FLAG_TWICE = (1 << 2),	/**< map the same area twice afer eachother,
 						  *  creating a circular ringbuffer */
+	PW_MEMMAP_FLAG_PRIVATE = (1 << 3),	/**< writes will be private */
 	PW_MEMMAP_FLAG_READWRITE = PW_MEMMAP_FLAG_READ | PW_MEMMAP_FLAG_WRITE,
 };