diff --git a/panda/src/movies/ffmpegVirtualFile.cxx b/panda/src/movies/ffmpegVirtualFile.cxx
index 54adedbb41..04a217a6f7 100644
--- a/panda/src/movies/ffmpegVirtualFile.cxx
+++ b/panda/src/movies/ffmpegVirtualFile.cxx
@@ -21,6 +21,7 @@
 extern "C" {
   #include "libavformat/avio.h"
 }
+#include <stdint.h>
 
 #ifndef AVSEEK_SIZE
   #define AVSEEK_SIZE 0x10000