diff --git i/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h w/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
index 101d39d455107..3764806240f9f 100644
--- i/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
+++ w/ipc/chromium/src/third_party/libevent/linux/event2/event-config.h
@@ -30,13 +30,13 @@
 /* #undef EVENT__HAVE_AFUNIX_H 1 */
 
 /* Define to 1 if you have the `arc4random' function. */
-/* #undef EVENT__HAVE_ARC4RANDOM */
+#define EVENT__HAVE_ARC4RANDOM 1
 
 /* Define to 1 if you have the `arc4random_addrandom' function. */
 /* #undef EVENT__HAVE_ARC4RANDOM_ADDRANDOM */
 
 /* Define to 1 if you have the `arc4random_buf' function. */
-/* #undef EVENT__HAVE_ARC4RANDOM_BUF */
+#define EVENT__HAVE_ARC4RANDOM_BUF 1
 
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #define EVENT__HAVE_ARPA_INET_H 1
diff --git i/toolkit/crashreporter/client/ping.cpp w/toolkit/crashreporter/client/ping.cpp
index 57cf85de80b79..93a2f6e80ad0b 100644
--- i/toolkit/crashreporter/client/ping.cpp
+++ w/toolkit/crashreporter/client/ping.cpp
@@ -53,7 +53,7 @@ static string GenerateUUID() {
 
   CFRelease(uuid);
 #elif defined(HAVE_ARC4RANDOM_BUF)  // Android, BSD, ...
-  arc4random_buf(id, sizeof(UUID));
+  arc4random_buf(&id, sizeof(UUID));
 #else                               // Linux
   int fd = open("/dev/urandom", O_RDONLY);