diff --git a/libc/bionic/mmap.cpp b/libc/bionic/mmap.cpp
index 9bc80a2..8301445 100644
--- a/libc/bionic/mmap.cpp
+++ b/libc/bionic/mmap.cpp
@@ -27,6 +27,7 @@
  */
 
 #include <errno.h>
+#include <stdint.h>
 #include <sys/mman.h>
 #include <unistd.h>