diff --git a/docs/source/inputs/InputsProblemDefinition.rst b/docs/source/inputs/InputsProblemDefinition.rst
index eb23b5ff14ed955278cac2fc75245f2ad1ef5b38..cff57c4fb36b6f6ade201c0967d2f5050db58f4b 100644
--- a/docs/source/inputs/InputsProblemDefinition.rst
+++ b/docs/source/inputs/InputsProblemDefinition.rst
@@ -543,6 +543,8 @@ For a fluid phase, the following inputs can be defined.
 +---------------------+-----------------------------------------------------------------------+-------------+-----------+
 | pressure            | Fluid pressure                                                        | Real        | None      |
 +---------------------+-----------------------------------------------------------------------+-------------+-----------+
+| density             | Fluid density                                                         | Real        | None      |
++---------------------+-----------------------------------------------------------------------+-------------+-----------+
 | temperature         | Fluid temperature                                                     | Real        | None      |
 +---------------------+-----------------------------------------------------------------------+-------------+-----------+
 | velocity            | Velocity components                                                   | Reals       | None      |