diff --git a/libc/bionic/open.cpp b/libc/bionic/open.cpp
index 6d179c4..222e5d3 100644
--- a/libc/bionic/open.cpp
+++ b/libc/bionic/open.cpp
@@ -43,6 +43,10 @@
 #endif
 }
 
+static inline bool needs_mode(int flags) {
+  return ((flags & O_CREAT) == O_CREAT) || ((flags & O_TMPFILE) == O_TMPFILE);
+}
+
 int creat(const char* pathname, mode_t mode) {
   return open(pathname, O_CREAT | O_TRUNC | O_WRONLY, mode);
 }
@@ -51,7 +55,7 @@
 int open(const char* pathname, int flags, ...) {
   mode_t mode = 0;
 
-  if ((flags & O_CREAT) != 0) {
+  if (needs_mode(flags)) {
     va_list args;
     va_start(args, flags);
     mode = static_cast<mode_t>(va_arg(args, int));
@@ -63,17 +67,14 @@
 __strong_alias(open64, open);
 
 int __open_2(const char* pathname, int flags) {
-  if (__predict_false((flags & O_CREAT) != 0)) {
-    __fortify_fatal("open(O_CREAT): called without specifying a mode");
-  }
-
+  if (needs_mode(flags)) __fortify_fatal("open: called with O_CREAT/O_TMPFILE but no mode");
   return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), 0);
 }
 
 int openat(int fd, const char *pathname, int flags, ...) {
   mode_t mode = 0;
 
-  if ((flags & O_CREAT) != 0) {
+  if (needs_mode(flags)) {
     va_list args;
     va_start(args, flags);
     mode = static_cast<mode_t>(va_arg(args, int));
@@ -85,9 +86,6 @@
 __strong_alias(openat64, openat);
 
 int __openat_2(int fd, const char* pathname, int flags) {
-  if ((flags & O_CREAT) != 0) {
-    __fortify_fatal("openat(O_CREAT): called without specifying a mode");
-  }
-
+  if (needs_mode(flags)) __fortify_fatal("open: called with O_CREAT/O_TMPFILE but no mode");
   return __openat(fd, pathname, force_O_LARGEFILE(flags), 0);
 }