diff --git a/src/pipewire/stream.c b/src/pipewire/stream.c
index 94956bda2..ce6a95f90 100644
--- a/src/pipewire/stream.c
+++ b/src/pipewire/stream.c
@@ -638,11 +638,18 @@ static inline void copy_position(struct stream *impl, int64_t queued)
 			impl->base_pos = p->clock.position - impl->time.ticks;
 			impl->clock_id = p->clock.id;
 		}
-		if (SPA_FLAG_IS_SET(p->clock.flags, SPA_IO_CLOCK_FLAG_NO_RATE))
-			impl->time.ticks = p->clock.nsec * p->clock.rate.denom /
-				(SPA_NSEC_PER_SEC * p->clock.rate.num);
-		else
+		if (SPA_FLAG_IS_SET(p->clock.flags, SPA_IO_CLOCK_FLAG_NO_RATE)) {
+			if (p->clock.rate.num == 0 || p->clock.rate.denom == 0) {
+				impl->time.ticks = p->clock.nsec;
+				impl->time.rate.num = 1;
+				impl->time.rate.denom = SPA_NSEC_PER_SEC;
+			} else {
+				impl->time.ticks = p->clock.nsec * (p->clock.rate.denom /
+					(SPA_NSEC_PER_SEC * p->clock.rate.num));
+			}
+		} else {
 			impl->time.ticks = p->clock.position - impl->base_pos;
+		}
 
 		impl->time.delay = 0;
 		impl->time.queued = queued;