diff --git a/libc/bionic/memmove_words.c b/libc/bionic/memmove_words.c
index 22058bc..26df7fa 100644
--- a/libc/bionic/memmove_words.c
+++ b/libc/bionic/memmove_words.c
@@ -15,6 +15,7 @@
  */
 
 #include <stdlib.h>
+#include <stdint.h>
 #include <assert.h>
 
 /*