diff --git a/libavcodec/ac3enc_template.c b/libavcodec/ac3enc_template.c
index 985b35e5b6..b85fe51ef5 100644
--- a/libavcodec/ac3enc_template.c
+++ b/libavcodec/ac3enc_template.c
@@ -42,7 +42,7 @@ int AC3_NAME(allocate_sample_buffers)(AC3EncodeContext *s)
     int ch;
 
     if (!FF_ALLOC_TYPED_ARRAY(s->windowed_samples, AC3_WINDOW_SIZE) ||
-        !FF_ALLOC_TYPED_ARRAY(s->planar_samples,   s->channels))
+        !FF_ALLOCZ_TYPED_ARRAY(s->planar_samples,  s->channels))
         return AVERROR(ENOMEM);
 
     for (ch = 0; ch < s->channels; ch++) {