diff --git a/src/common/common.cpp b/src/common/common.cpp
index fe7733269..f94f3e1d1 100644
--- a/src/common/common.cpp
+++ b/src/common/common.cpp
@@ -1315,7 +1315,7 @@ mxmsg(int level,
     mm_stdio->puts(prefix);
 
   output = from_utf8(cc_stdio, mxvsprintf(new_fmt.c_str(), ap));
-  mm_stdio->puts(output);
+  mm_stdio->write(output.c_str(), output.length());
   mm_stdio->flush();
 }