diff --git a/examples/ex15_actions/include/actions/ConvectionDiffusionAction.h b/examples/ex15_actions/include/actions/ConvectionDiffusionAction.h
index f2cf2418047c..9303acd2c0df 100644
--- a/examples/ex15_actions/include/actions/ConvectionDiffusionAction.h
+++ b/examples/ex15_actions/include/actions/ConvectionDiffusionAction.h
@@ -14,7 +14,7 @@
 class ConvectionDiffusionAction : public Action
 {
 public:
-  ConvectionDiffusionAction(InputParameters params);
+  ConvectionDiffusionAction(const InputParameters & params);
 
   static InputParameters validParams();
 
diff --git a/examples/ex15_actions/src/actions/ConvectionDiffusionAction.C b/examples/ex15_actions/src/actions/ConvectionDiffusionAction.C
index a66527142d56..0fa1b30422f3 100644
--- a/examples/ex15_actions/src/actions/ConvectionDiffusionAction.C
+++ b/examples/ex15_actions/src/actions/ConvectionDiffusionAction.C
@@ -24,7 +24,10 @@ ConvectionDiffusionAction::validParams()
   return params;
 }
 
-ConvectionDiffusionAction::ConvectionDiffusionAction(InputParameters params) : Action(params) {}
+ConvectionDiffusionAction::ConvectionDiffusionAction(const InputParameters & params)
+  : Action(params)
+{
+}
 
 void
 ConvectionDiffusionAction::act()