diff --git a/doc/Section_intro.html b/doc/Section_intro.html
index f635732571..3d9524056d 100644
--- a/doc/Section_intro.html
+++ b/doc/Section_intro.html
@@ -254,6 +254,7 @@ molecular dynamics options:
 <LI><A HREF = "body.html">generalized aspherical particles</A>
 <LI><A HREF = "fix_srd.html">stochastic rotation dynamics (SRD)</A>
 <LI><A HREF = "fix_imd.html">real-time visualization and interactive MD</A>
+<LI>calculate <A HREF = "compute_xrd.html">virtual diffraction patterns</A>
 <LI><A HREF = "fix_atc.html">atom-to-continuum coupling</A> with finite elements
 <LI>coupled rigid body integration via the <A HREF = "fix_poems.html">POEMS</A> library
 <LI><A HREF = "fix_qmmm.html">QM/MM coupling</A>
diff --git a/doc/Section_intro.txt b/doc/Section_intro.txt
index bd64e80326..25fc9ff35f 100644
--- a/doc/Section_intro.txt
+++ b/doc/Section_intro.txt
@@ -252,6 +252,7 @@ molecular dynamics options:
 "generalized aspherical particles"_body.html
 "stochastic rotation dynamics (SRD)"_fix_srd.html
 "real-time visualization and interactive MD"_fix_imd.html
+calculate "virtual diffraction patterns"_compute_xrd.html
 "atom-to-continuum coupling"_fix_atc.html with finite elements
 coupled rigid body integration via the "POEMS"_fix_poems.html library
 "QM/MM coupling"_fix_qmmm.html