diff --git a/include/stdlib.h b/include/stdlib.h
index e9a8b84..b76078c 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -630,16 +630,21 @@ extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
    marked with __THROW.  */
 # ifndef __USE_FILE_OFFSET64
 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
+extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
 # else
 #  ifdef __REDIRECT
 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
      __nonnull ((1)) __wur;
+extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
+     __nonnull ((1)) __wur;
 #  else
 #   define mkstemp mkstemp64
+#   define mkostemp mkostemp64
 #  endif
 # endif
 # ifdef __USE_LARGEFILE64
 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
+extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
 # endif
 #endif
 
diff --git a/libc/stdlib/mkstemp.c b/libc/stdlib/mkstemp.c
index ce7d7db..68581b8 100644
--- a/libc/stdlib/mkstemp.c
+++ b/libc/stdlib/mkstemp.c
@@ -25,7 +25,12 @@
    The last six characters of TEMPLATE must be "XXXXXX";
    they are replaced with a string that makes the filename unique.
    Then open the file and return a fd. */
+int mkostemp (char *template, int flags)
+{
+    return __gen_tempname (template, __GT_FILE, flags);
+}
+
 int mkstemp (char *template)
 {
-    return __gen_tempname (template, __GT_FILE, S_IRUSR | S_IWUSR);
+    return mkostemp(template, S_IRUSR | S_IWUSR);
 }
diff --git a/libc/stdlib/mkstemp64.c b/libc/stdlib/mkstemp64.c
index 2cdee70..375c5d3 100644
--- a/libc/stdlib/mkstemp64.c
+++ b/libc/stdlib/mkstemp64.c
@@ -25,7 +25,12 @@
    The last six characters of TEMPLATE must be "XXXXXX";
    they are replaced with a string that makes the filename unique.
    Then open the file and return a fd. */
+int mkostemp64 (char *template, int flags)
+{
+    return __gen_tempname (template, __GT_BIGFILE, flags);
+}
+
 int mkstemp64 (char *template)
 {
-    return __gen_tempname (template, __GT_BIGFILE, S_IRUSR | S_IWUSR);
+    return mkostemp64 (template, S_IRUSR | S_IWUSR);
 }