diff --git a/lib/std/log.zig b/lib/std/log.zig
index 5c4650cc1c..0562d09c51 100644
--- a/lib/std/log.zig
+++ b/lib/std/log.zig
@@ -149,9 +149,15 @@ pub fn defaultLog(
     const level_txt = comptime message_level.asText();
     const prefix2 = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
     const stderr = std.io.getStdErr().writer();
+    var bw = std.io.bufferedWriter(stderr);
+    const writer = bw.writer();
+
     std.debug.getStderrMutex().lock();
     defer std.debug.getStderrMutex().unlock();
-    nosuspend stderr.print(level_txt ++ prefix2 ++ format ++ "\n", args) catch return;
+    nosuspend {
+        writer.print(level_txt ++ prefix2 ++ format ++ "\n", args) catch return;
+        bw.flush() catch return;
+    }
 }
 
 /// Returns a scoped logging namespace that logs all messages using the scope