diff --git a/src/modules/bluetooth/a2dp-codec-sbc.c b/src/modules/bluetooth/a2dp-codec-sbc.c
index 22726cd53236f6bc7cbb60bc3aa1980fb634176a..28439e89ca11a7e32b864179ccdbd42c322fc266 100644
--- a/src/modules/bluetooth/a2dp-codec-sbc.c
+++ b/src/modules/bluetooth/a2dp-codec-sbc.c
@@ -332,8 +332,8 @@ static int cmp_endpoints_fixed_bitpool(const uint8_t *capabilities1_buffer, uint
     const a2dp_sbc_t *capabilities2 = (const a2dp_sbc_t *) capabilities2_buffer;
     int cmp;
 
-    pa_assert(capabilities1_size == sizeof(a2dp_sbc_t));
-    pa_assert(capabilities2_size == sizeof(a2dp_sbc_t));
+    pa_assert(capabilities1_size == sizeof(*capabilities1));
+    pa_assert(capabilities2_size == sizeof(*capabilities2));
 
     cmp = cmp_endpoints_by_channels(capabilities1, capabilities2, default_sample_spec, for_encoding);
     if (cmp != 0)