diff --git a/libavcodec/cbrt_tablegen.c b/libavcodec/cbrt_tablegen.c
index e92c0f1db1..44c2695560 100644
--- a/libavcodec/cbrt_tablegen.c
+++ b/libavcodec/cbrt_tablegen.c
@@ -21,6 +21,7 @@
  */
 
 #include <stdlib.h>
+#include "libavutil/libm.h"
 #define CONFIG_HARDCODED_TABLES 0
 #include "cbrt_tablegen.h"
 #include "tableprint.h"