diff --git a/src/docs/part1/simple_detector.md b/src/docs/part1/simple_detector.md
index 145859b80b05e1af3c5bbd668b3cda9f91080c68..098c9c045a55395233cdf3b85f0c6254eb9380df 100644
--- a/src/docs/part1/simple_detector.md
+++ b/src/docs/part1/simple_detector.md
@@ -31,7 +31,7 @@ You will find the following files and directories.
 
 The files 
 [`materials.xml`](https://eicweb.phy.anl.gov/Argonne_EIC/tutorial/tutorial_part1/blob/master/materials.xml), 
-(`elements.xml`](https://eicweb.phy.anl.gov/Argonne_EIC/tutorial/tutorial_part1/blob/master/elements.xml),
+[`elements.xml`](https://eicweb.phy.anl.gov/Argonne_EIC/tutorial/tutorial_part1/blob/master/elements.xml),
 and 
 [`gem_tracker.xml`](https://eicweb.phy.anl.gov/Argonne_EIC/tutorial/tutorial_part1/blob/master/gem_tracker.xml) 
 are the compact detector description files. The first two files are included in