diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c
index 0f70ed850c..91a927cb09 100644
--- a/libavcodec/mdct.c
+++ b/libavcodec/mdct.c
@@ -31,10 +31,10 @@ int ff_mdct_init(MDCTContext *s, int nbits, int inverse)
     s->nbits = nbits;
     s->n = n;
     n4 = n >> 2;
-    s->tcos = malloc(n4 * sizeof(FFTSample));
+    s->tcos = av_malloc(n4 * sizeof(FFTSample));
     if (!s->tcos)
         goto fail;
-    s->tsin = malloc(n4 * sizeof(FFTSample));
+    s->tsin = av_malloc(n4 * sizeof(FFTSample));
     if (!s->tsin)
         goto fail;