diff --git a/docs/source/quick_start.rst b/docs/source/quick_start.rst
index fa9d91d..529b838 100644
--- a/docs/source/quick_start.rst
+++ b/docs/source/quick_start.rst
@@ -33,7 +33,7 @@ Below are simple instructions on how to do your first reconstruction:
 
 - **Initialize a model:**
 
-  - Run ``model = mbirjax.parallel_beam.ParallelBeamModel(angles, sinogram.shape)`` to initialize a parallel beam model.
+  - Run ``model = mbirjax.parallel_beam.ParallelBeamModel(sinogram.shape, angles)`` to initialize a parallel beam model.
 
   You will then use the ``model`` object to perform the various reconstruction functions.