diff --git a/src/pulse/stream.c b/src/pulse/stream.c
index e10ab127b..ee95757f7 100644
--- a/src/pulse/stream.c
+++ b/src/pulse/stream.c
@@ -33,6 +33,7 @@
 #include <pulse/fork-detect.h>
 
 #include <pulsecore/pstream-util.h>
+#include <pulsecore/sample-util.h>
 #include <pulsecore/log.h>
 #include <pulsecore/hashmap.h>
 #include <pulsecore/macro.h>
@@ -1532,8 +1533,12 @@ int pa_stream_write_ext_free(
                 chunk.length = t_length;
             } else {
                 void *d;
+                size_t blk_size_max;
 
-                chunk.length = PA_MIN(t_length, pa_mempool_block_size_max(s->context->mempool));
+                /* Break large audio streams into _aligned_ blocks or the
+                 * other endpoint will happily discard them upon arrival. */
+                blk_size_max = pa_frame_align(pa_mempool_block_size_max(s->context->mempool), &s->sample_spec);
+                chunk.length = PA_MIN(t_length, blk_size_max);
                 chunk.memblock = pa_memblock_new(s->context->mempool, chunk.length);
 
                 d = pa_memblock_acquire(chunk.memblock);