diff --git a/src/fm95.c b/src/fm95.c
index 419d1cd..77efc44 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -587,7 +587,12 @@ int main(int argc, char **argv) {
                 break;
             }
         } else {
-            snd_pcm_writei(output_handle, output, sizeof(output));
+            snd_pcm_sframes_t frames_written = snd_pcm_writei(output_handle, output, BUFFER_SIZE);
+            if (frames_written < 0) {
+                fprintf(stderr, "Error: write to audio interface failed: %s\n", snd_strerror(frames_written));
+            } else if (frames_written < BUFFER_SIZE) {
+                fprintf(stderr, "Warning: underrun, only %ld frames written out of %d\n", frames_written, BUFFER_SIZE);
+            }
         }
     }
     printf("Cleaning up...\n");