diff --git a/libavcodec/libxvid.c b/libavcodec/libxvid.c
index 3ec9524c93..b521e010e3 100644
--- a/libavcodec/libxvid.c
+++ b/libavcodec/libxvid.c
@@ -39,6 +39,10 @@
 #include <unistd.h>
 #endif
 
+#if HAVE_IO_H
+#include <io.h>
+#endif
+
 /**
  * Buffer management macros.
  */
diff --git a/libavcodec/libxvid_rc.c b/libavcodec/libxvid_rc.c
index 1351dcde6d..ae6ddb89d1 100644
--- a/libavcodec/libxvid_rc.c
+++ b/libavcodec/libxvid_rc.c
@@ -32,6 +32,10 @@
 #include <unistd.h>
 #endif
 
+#if HAVE_IO_H
+#include <io.h>
+#endif
+
 #undef NDEBUG
 #include <assert.h>
 
diff --git a/libavutil/random_seed.c b/libavutil/random_seed.c
index e3ffaff014..8aa8c3879b 100644
--- a/libavutil/random_seed.c
+++ b/libavutil/random_seed.c
@@ -23,6 +23,9 @@
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#if HAVE_IO_H
+#include <io.h>
+#endif
 #if HAVE_CRYPTGENRANDOM
 #include <windows.h>
 #include <wincrypt.h>