diff --git a/src/ffmpeg_windows.c b/src/ffmpeg_windows.c
index 53e4f9c..4c605df 100644
--- a/src/ffmpeg_windows.c
+++ b/src/ffmpeg_windows.c
@@ -2,6 +2,7 @@
 #include <stdio.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include <stdlib.h>
 
 #define WIN32_LEAN_AND_MEAN
 #define _WINUSER_