diff --git a/docs/source/Inputs_Chapter.rst b/docs/source/Inputs_Chapter.rst
index 8a5af2e163a72aab6da4a8f009cc6b4f00da2a47..1b6b11ec68ed96c1aba47281781f37a3856a9a49 100644
--- a/docs/source/Inputs_Chapter.rst
+++ b/docs/source/Inputs_Chapter.rst
@@ -38,8 +38,8 @@ keywords such as ``mfix``, ``amr``, ``geometry``, ``nodal_proj`` etc.
 .. toctree::
    :maxdepth: 1
 
-   Units, mesh, geometry, species, fluid, DEM, regions, initial and boundary conditions <inputs/InputsProblemDefinition>
-   Particle drag <inputs/InputsDrag>
+   inputs/InputsProblemDefinition
+   inputs/InputsCoupling
    inputs/InputsTimeStepping
    inputs/InputsInitialization
    inputs/InputsLoadBalancing
diff --git a/docs/source/inputs/InputsDrag.rst b/docs/source/inputs/InputsCoupling.rst
similarity index 98%
rename from docs/source/inputs/InputsDrag.rst
rename to docs/source/inputs/InputsCoupling.rst
index 544315aa2043457d1ed1d7845ab8440def5cd299..7bb0f73de2985ba1954966e4ffd41c872d212e46 100644
--- a/docs/source/inputs/InputsDrag.rst
+++ b/docs/source/inputs/InputsCoupling.rst
@@ -1,5 +1,8 @@
-Drag Types
-==========
+Interphase Coupling
+===================
+
+Drag
+----
 
 The following inputs must be preceded by "mfix."