diff --git a/libc/bionic/syslog.cpp b/libc/bionic/syslog.cpp
index 6b17d26..a459c6b 100644
--- a/libc/bionic/syslog.cpp
+++ b/libc/bionic/syslog.cpp
@@ -18,18 +18,22 @@
 #include <stdlib.h>
 #include <string.h>
 #include <syslog.h>
+#include <unistd.h>
 
 #include <async_safe/log.h>
 
 static const char* syslog_log_tag = nullptr;
 static int syslog_priority_mask = 0xff;
+static int syslog_options = 0;
 
 void closelog() {
   syslog_log_tag = nullptr;
+  syslog_options = 0;
 }
 
-void openlog(const char* log_tag, int /*options*/, int /*facility*/) {
+void openlog(const char* log_tag, int options, int /*facility*/) {
   syslog_log_tag = log_tag;
+  syslog_options = options;
 }
 
 int setlogmask(int new_mask) {
@@ -73,10 +77,16 @@
     android_log_priority = ANDROID_LOG_DEBUG;
   }
 
-  // We can't let async_safe_format_log do the formatting because it doesn't support
-  // all the printf functionality.
+  // We can't let async_safe_format_log do the formatting because it doesn't
+  // support all the printf functionality.
   char log_line[1024];
-  vsnprintf(log_line, sizeof(log_line), fmt, args);
+  int n = vsnprintf(log_line, sizeof(log_line), fmt, args);
+  if (n < 0) return;
 
   async_safe_format_log(android_log_priority, log_tag, "%s", log_line);
+  if ((syslog_options & LOG_PERROR) != 0) {
+    bool have_newline =
+        (n > 0 && n < static_cast<int>(sizeof(log_line)) && log_line[n - 1] == '\n');
+    dprintf(STDERR_FILENO, "%s: %s%s", log_tag, log_line, have_newline ? "" : "\n");
+  }
 }
diff --git a/libc/include/syslog.h b/libc/include/syslog.h
index d89d769..90ea76e 100644
--- a/libc/include/syslog.h
+++ b/libc/include/syslog.h
@@ -112,17 +112,21 @@
  */
 #define LOG_UPTO(pri) ((1 << ((pri)+1)) - 1)
 
-/** openlog() options are currently ignored on Android. */
+/** openlog() option ignored on Android. */
 #define LOG_PID    0x01
-/** openlog() options are currently ignored on Android. */
+/** openlog() option ignored on Android. */
 #define LOG_CONS   0x02
-/** openlog() options are currently ignored on Android. */
+/** openlog() option ignored on Android. */
 #define LOG_ODELAY 0x04
-/** openlog() options are currently ignored on Android. */
+/** openlog() option ignored on Android. */
 #define LOG_NDELAY 0x08
-/** openlog() options are currently ignored on Android. */
+/** openlog() option ignored on Android. */
 #define LOG_NOWAIT 0x10
-/** openlog() options are currently ignored on Android. */
+/**
+ * openlog() option to log to stderr as well as the system log.
+ *
+ * Available since API level 34 (ignored before then).
+ */
 #define LOG_PERROR 0x20
 
 /**