diff --git a/include/nuttx/audio/audio.h b/include/nuttx/audio/audio.h
index 1395873622..c3872c081a 100644
--- a/include/nuttx/audio/audio.h
+++ b/include/nuttx/audio/audio.h
@@ -377,7 +377,7 @@ begin_packed_struct struct ap_buffer_s
   sem_t                 sem;        /* Reference locking semaphore */
   uint16_t              flags;      /* Buffer flags */
   uint16_t              crefs;      /* Number of reference counts */
-  uint8_t               samp[0];    /* Offset of the first sample */
+  FAR uint8_t           *samp;      /* Offset of the first sample */
 } end_packed_struct;
 
 /* Structure defining the messages passed to a listening audio thread
diff --git a/libs/libc/audio/lib_buffer.c b/libs/libc/audio/lib_buffer.c
index 2b548b66bb..55d22ca902 100644
--- a/libs/libc/audio/lib_buffer.c
+++ b/libs/libc/audio/lib_buffer.c
@@ -130,6 +130,7 @@ int apb_alloc(FAR struct audio_buf_desc_s *bufdesc)
       apb->nmaxbytes  = bufdesc->numbytes;
       apb->nbytes     = 0;
       apb->flags      = 0;
+      apb->samp       = (FAR uint8_t *)(apb + 1);
 #ifdef CONFIG_AUDIO_MULTI_SESSION
       apb->session    = bufdesc->session;
 #endif