diff --git a/external/md4c.c b/external/md4c.c
index 8665a14..1c23cd1 100644
--- a/external/md4c.c
+++ b/external/md4c.c
@@ -24,7 +24,6 @@
  */
 
 #include <limits.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>