diff --git a/docs/source/tools/usgscsm_cam_test.rst b/docs/source/tools/usgscsm_cam_test.rst
index 84ea70f5f35af74801f777e59ce56fc408b0b297..9cdfcc5de81e38634bf2765de087aba6d65d73cd 100644
--- a/docs/source/tools/usgscsm_cam_test.rst
+++ b/docs/source/tools/usgscsm_cam_test.rst
@@ -47,7 +47,7 @@ Command line options
     Use this value for operations (ground-to-image and image-to-ground)
     which need a precision value. Measured in pixels.
 
---modify-sup-file (default: "")>
+--modify-sup-file <string (default: "")>
     Input GXP .sup file to be modified by inputted CSM model. This will override
     the existing .sup file's SENSOR_STATE.