diff --git a/libavcodec/libvorbis.c b/libavcodec/libvorbis.c
index 88da705a3297a1bbfb2c3e487b2a172c8a8073ec..85cb9c5989c70db81af661e31317b0190b530677 100644
--- a/libavcodec/libvorbis.c
+++ b/libavcodec/libvorbis.c
@@ -30,6 +30,7 @@
 #include "avcodec.h"
 #include "bytestream.h"
 #include "vorbis.h"
+#include "libavutil/mathematics.h"
 
 #undef NDEBUG
 #include <assert.h>
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index 02f813538132329c4dfe18a625794800a60922f0..ca2e6157d503df89179e6c33c344d1bc51047bc0 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -30,6 +30,7 @@
 
 #include "avcodec.h"
 #include "libavutil/base64.h"
+#include "libavutil/mathematics.h"
 
 /**
  * Portion of struct vpx_codec_cx_pkt from vpx_encoder.h.