diff --git a/doc/idas/guide/source/Introduction.rst b/doc/idas/guide/source/Introduction.rst
index 4f11b2a59b..e494421524 100644
--- a/doc/idas/guide/source/Introduction.rst
+++ b/doc/idas/guide/source/Introduction.rst
@@ -1736,7 +1736,7 @@ The structure of this document is as follows:
   (:numref:`IDAS.Mathematics.rootfinding`).
 
 * The following chapter describes the structure of the SUNDIALS suite of solvers
-  (:numref:`Organization`) and the software organization of the IDAS solver
+  (:numref:`IDAS.Organization`) and the software organization of the IDAS solver
   (:numref:`IDAS.Organization.IDAS`).
 
 * Chapter :numref:`IDAS.Usage.SIM` is the main usage document for IDAS
diff --git a/doc/idas/guide/source/sundials/Types_link.rst b/doc/idas/guide/source/sundials/Types_link.rst
index 85f0ca82e8..e7ba90159d 100644
--- a/doc/idas/guide/source/sundials/Types_link.rst
+++ b/doc/idas/guide/source/sundials/Types_link.rst
@@ -10,4 +10,4 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
-.. include:: ../../../../shared/Types.rst
+.. include:: ../../../../shared/sundials/Types.rst
diff --git a/doc/idas/guide/source/sundials/index.rst b/doc/idas/guide/source/sundials/index.rst
index 11c6919b0a..136010f1da 100644
--- a/doc/idas/guide/source/sundials/index.rst
+++ b/doc/idas/guide/source/sundials/index.rst
@@ -16,7 +16,7 @@
 Using SUNDIALS
 **************
 
-As discussed in :numref:`Organization`, the all SUNDIALS packages are built upon
+As discussed in :numref:`IDAS.Organization`, the all SUNDIALS packages are built upon
 a common set of interfaces for vectors, matrices, and algebraic solvers. In
 addition, the packages all leverage some other common infrastructure discussed
 in this section.