diff --git a/libavutil/timestamp.h b/libavutil/timestamp.h
index bffadd2716..c7348d8f12 100644
--- a/libavutil/timestamp.h
+++ b/libavutil/timestamp.h
@@ -26,7 +26,6 @@
 
 #include "common.h"
 
-#define AV_TS_MAX_STRING_SIZE 32
 #define AV_TS_MAX_STRING_SIZE 32
 
 /**