diff --git a/src/CabanaPD_Input.hpp b/src/CabanaPD_Input.hpp
index fc27bd0..41f1e4d 100644
--- a/src/CabanaPD_Input.hpp
+++ b/src/CabanaPD_Input.hpp
@@ -174,7 +174,7 @@ class Inputs
     }
 
     template <class ForceModel>
-    void computeCriticalTimeStep( ForceModel model )
+    void computeCriticalTimeStep( [[maybe_unused]] const ForceModel model )
     {
         // Reference: Silling & Askari, Computers & Structures 83(17–18) (2005):
         // 1526-1535.