diff --git a/nopanic.tex b/nopanic.tex
index 17e81d6..ef8f740 100644
--- a/nopanic.tex
+++ b/nopanic.tex
@@ -24,10 +24,16 @@
 \newcommand\linklist{}
 \makeatletter
 \newcommand{\link}[1]{%
-    \protected@edef\@tmpkey{{\fontsize{13pt}{0}\selectfont\keys{\arabic{linkcounter}}}}%
+    \edef\tmptoken{\detokenize{#1}}%
+    \@ifundefined{nopanic@link@\tmptoken}{%
+        \protected@edef\@tmpkey{{\fontsize{13pt}{0}\selectfont\keys{\arabic{linkcounter}}}}%
+        \expandafter\global\expandafter\edef\csname nopanic@link@\tmptoken\endcsname{\arabic{linkcounter}}%
+        \expandafter\g@addto@macro\expandafter\linklist\expandafter{\@tmpkey & \url{#1}\\}%
+        \stepcounter{linkcounter}%
+    }{%
+        \protected@edef\@tmpkey{{\fontsize{13pt}{0}\selectfont\keys{\csname nopanic@link@\tmptoken\endcsname}}}%
+    }%
     \href{#1}{\@tmpkey}%
-    \expandafter\g@addto@macro\expandafter\linklist\expandafter{\@tmpkey & \url{#1}\\}%
-    \stepcounter{linkcounter}%
 }
 \makeatother