diff --git a/lib/libc/stdio/fdopen.c b/lib/libc/stdio/fdopen.c
index 02378edcdce8..072d3227cc05 100644
--- a/lib/libc/stdio/fdopen.c
+++ b/lib/libc/stdio/fdopen.c
@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
 #include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
+#include <limits.h>
 #include "un-namespace.h"
 #include "local.h"
 
diff --git a/lib/libc/stdio/fopen.c b/lib/libc/stdio/fopen.c
index a6c0028dbd96..14ec9bc5b72b 100644
--- a/lib/libc/stdio/fopen.c
+++ b/lib/libc/stdio/fopen.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 #include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
+#include <limits.h>
 #include "un-namespace.h"
 
 #include "local.h"
diff --git a/lib/libc/stdio/freopen.c b/lib/libc/stdio/freopen.c
index a5663866c296..45f7d84c9020 100644
--- a/lib/libc/stdio/freopen.c
+++ b/lib/libc/stdio/freopen.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <limits.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>