diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
--- a/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp
@@ -820,11 +820,11 @@
 
 inline void CRAppendCrashLogMessage(const char *msg) {
   BlockingMutexLock l(&__crashreporter_info_mutex__);
+  internal_strlcat(__crashreporter_info_buff__, msg,
+                   sizeof(__crashreporter_info_buff__));
 #if HAVE_CRASHREPORTERCLIENT_H
   (void)CRSetCrashLogMessage(__crashreporter_info_buff__);
 #endif
-  internal_strlcat(__crashreporter_info_buff__, msg,
-                   sizeof(__crashreporter_info_buff__));
 }
 
 void LogMessageOnPrintf(const char *str) {