diff --git a/libavcodec/dct.c b/libavcodec/dct.c
index b1ee06a817..26b485106d 100644
--- a/libavcodec/dct.c
+++ b/libavcodec/dct.c
@@ -190,7 +190,7 @@ av_cold int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType inverse)
         ff_init_ff_cos_tabs(nbits + 2);
 
         s->costab = ff_cos_tabs[nbits + 2];
-        s->csc2   = av_malloc(n / 2 * sizeof(FFTSample));
+        s->csc2   = av_malloc_array(n / 2, sizeof(FFTSample));
 
         if (ff_rdft_init(&s->rdft, nbits, inverse == DCT_III) < 0) {
             av_free(s->csc2);