diff --git a/src/pulsecore/sample-util.c b/src/pulsecore/sample-util.c
index 8a13495cb..16ec4ad2d 100644
--- a/src/pulsecore/sample-util.c
+++ b/src/pulsecore/sample-util.c
@@ -734,7 +734,7 @@ void pa_volume_memchunk(
 
     pa_assert(c);
     pa_assert(spec);
-    pa_assert(c->length % pa_frame_size(spec) == 0);
+    pa_assert(pa_frame_aligned(c->length, spec));
     pa_assert(volume);
 
     if (pa_memblock_is_silence(c->memblock))