diff --git a/FFmpegSource2/utils.cpp b/FFmpegSource2/utils.cpp
index abd1b9cee..9f6f94592 100644
--- a/FFmpegSource2/utils.cpp
+++ b/FFmpegSource2/utils.cpp
@@ -20,6 +20,7 @@
 
 #include "utils.h"
 #include <string.h>
+#include <errno.h>
 #include <intrin.h>
 
 int GetCPUFlags() {