diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 0a1341263c..553c57ee46 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -25,6 +25,11 @@
 #include "libavutil/pixdesc.h"
 #include "avcodec.h"
 #include "internal.h"
+
+#if defined(_MSC_VER)
+#define X264_API_IMPORTS 1
+#endif
+
 #include <x264.h>
 #include <float.h>
 #include <math.h>