diff --git a/base/proposal.dtx b/base/proposal.dtx
index ca14e58..1b5494e 100644
--- a/base/proposal.dtx
+++ b/base/proposal.dtx
@@ -1448,7 +1448,7 @@
 %   the corresponding presentation macro.
 %    \begin{macrocode}
 \newcommand\@milestone[3]{% id, title, description
-\item \textbf{\miles@legend@milestone \pdata@target{mile}\mile@id{\pdataref{mile}{#1}{label}} 
+\item \textbf{\miles@legend@milestone\xspace\pdata@target{mile}\mile@id{\pdataref{mile}{#1}{label}} 
 (\miles@legend@month \pdataref{mile}\mile@id{month})
 \textbf{#2}} #3}
 \newcommand\miles@legend@month{Month}