diff --git a/libcxx/src/verbose_abort.cpp b/libcxx/src/verbose_abort.cpp
--- a/libcxx/src/verbose_abort.cpp
+++ b/libcxx/src/verbose_abort.cpp
@@ -36,6 +36,7 @@
     va_list list;
     va_start(list, format);
     std::vfprintf(stderr, format, list);
+    std::fputc('\n', stderr);
     va_end(list);
   }