diff --git a/SRC/dtrsyl3.f b/SRC/dtrsyl3.f
index 7d794819c..79fcf4a01 100644
--- a/SRC/dtrsyl3.f
+++ b/SRC/dtrsyl3.f
@@ -178,6 +178,8 @@
 *>               A and B are unchanged).
 *> \endverbatim
 *
+*> \ingroup trsyl3
+*
 *  =====================================================================
 *  References:
 *   E. S. Quintana-Orti and R. A. Van De Geijn (2003). Formal derivation of
diff --git a/SRC/strsyl3.f b/SRC/strsyl3.f
index baa1ce5c3..5f1d70dbb 100644
--- a/SRC/strsyl3.f
+++ b/SRC/strsyl3.f
@@ -177,6 +177,8 @@
 *>               A and B are unchanged).
 *> \endverbatim
 *
+*> \ingroup trsyl3
+*
 *  =====================================================================
 *  References:
 *   E. S. Quintana-Orti and R. A. Van De Geijn (2003). Formal derivation of