diff --git a/src/pipewire/context.c b/src/pipewire/context.c
index f4b6f5bd8..2f72e408c 100644
--- a/src/pipewire/context.c
+++ b/src/pipewire/context.c
@@ -1112,7 +1112,7 @@ again:
 
 	/* assign final quantum and set state for followers and drivers */
 	spa_list_for_each(n, &context->driver_list, driver_link) {
-		bool running = false;
+		bool running = false, lock_quantum = false;
 		uint32_t quantum = 0;
 
 		if (!n->driving || n->exported)
@@ -1121,6 +1121,8 @@ again:
 		/* collect quantum and count active nodes */
 		spa_list_for_each(s, &n->follower_list, follower_link) {
 
+			lock_quantum |= s->lock_quantum;
+
 			if (s->quantum_size > 0) {
 				if (quantum == 0 || s->quantum_size < quantum)
 					quantum = s->quantum_size;
@@ -1147,7 +1149,7 @@ again:
 
 			n->rt.position->clock.rate = SPA_FRACTION(1, def_rate);
 		}
-		if (quantum != n->rt.position->clock.duration) {
+		if (quantum != n->rt.position->clock.duration && !lock_quantum) {
 			pw_log_info("(%s-%u) new quantum:%"PRIu64"->%u",
 					n->name, n->info.id,
 					n->rt.position->clock.duration,
diff --git a/src/pipewire/impl-node.c b/src/pipewire/impl-node.c
index 88066ee0d..ba1b0d6cb 100644
--- a/src/pipewire/impl-node.c
+++ b/src/pipewire/impl-node.c
@@ -914,6 +914,8 @@ static void check_properties(struct pw_impl_node *node)
 			}
 		}
 	}
+	str = pw_properties_get(node->properties, PW_KEY_NODE_LOCK_QUANTUM);
+	node->lock_quantum = str ? pw_properties_parse_bool(str) : false;
 
 	pw_log_debug(NAME" %p: driver:%d recalc:%s active:%d", node, node->driver,
 			recalc_reason, node->active);
diff --git a/src/pipewire/keys.h b/src/pipewire/keys.h
index 80c6fe4d7..a47df5780 100644
--- a/src/pipewire/keys.h
+++ b/src/pipewire/keys.h
@@ -155,6 +155,9 @@ extern "C" {
 								  *  a fraction. Ex: 128/48000 */
 #define PW_KEY_NODE_MAX_LATENCY		"node.max-latency"	/**< the maximum supported latency of the
 								  *  node as a fraction. Ex: 1024/48000 */
+#define PW_KEY_NODE_LOCK_QUANTUM	"node.lock-quantum"	/**< don't change quantum when this node
+								  *  is active */
+
 #define PW_KEY_NODE_DONT_RECONNECT	"node.dont-reconnect"	/**< don't reconnect this node */
 #define PW_KEY_NODE_ALWAYS_PROCESS	"node.always-process"	/**< process even when unlinked */
 #define PW_KEY_NODE_WANT_DRIVER		"node.want-driver"	/**< the node wants to be grouped with a driver
diff --git a/src/pipewire/private.h b/src/pipewire/private.h
index bf8597b7c..6fb195012 100644
--- a/src/pipewire/private.h
+++ b/src/pipewire/private.h
@@ -677,6 +677,7 @@ struct pw_impl_node {
 	unsigned int freewheel:1;	/**< if this is the freewheel driver */
 	unsigned int loopchecked:1;	/**< for feedback loop checking */
 	unsigned int always_process:1;	/**< this node wants to always be processing, even when idle */
+	unsigned int lock_quantum:1;	/**< don't change graph quantum */
 
 	uint32_t port_user_data_size;	/**< extra size for port user data */