diff --git a/doc/fsl.utils.naninfrange.rst b/doc/fsl.utils.naninfrange.rst
new file mode 100644
index 0000000000000000000000000000000000000000..4838cea72d3ce4b19549d991d3d045407f443c09
--- /dev/null
+++ b/doc/fsl.utils.naninfrange.rst
@@ -0,0 +1,7 @@
+``fsl.utils.naninfrange``
+=========================
+
+.. automodule:: fsl.utils.naninfrange
+    :members:
+    :undoc-members:
+    :show-inheritance:
diff --git a/doc/fsl.utils.rst b/doc/fsl.utils.rst
index 44d4f4056a77d1bd151823fa2ed6e6da6b7b6922..ce6e4db0a6a1377707b221581a599f4f780057a4 100644
--- a/doc/fsl.utils.rst
+++ b/doc/fsl.utils.rst
@@ -9,6 +9,7 @@
    fsl.utils.idle
    fsl.utils.imcp
    fsl.utils.memoize
+   fsl.utils.naninfrange
    fsl.utils.notifier
    fsl.utils.path
    fsl.utils.platform