diff --git a/tutorial/rs/Makefile.am b/tutorial/rs/Makefile.am
index 4aa05da..13f6707 100644
--- a/tutorial/rs/Makefile.am
+++ b/tutorial/rs/Makefile.am
@@ -25,6 +25,7 @@
 all-local: gen-rs/tutorial.rs
 	$(CARGO) build
 	$(CARGO) fmt --all -- --check
+	$(CARGO) clippy --all -- -D warnings
 	[ -d bin ] || mkdir bin
 	cp target/debug/tutorial_server bin/tutorial_server
 	cp target/debug/tutorial_client bin/tutorial_client
diff --git a/tutorial/rs/src/bin/tutorial_server.rs b/tutorial/rs/src/bin/tutorial_server.rs
index ad16ab6..ab6df57 100644
--- a/tutorial/rs/src/bin/tutorial_server.rs
+++ b/tutorial/rs/src/bin/tutorial_server.rs
@@ -131,11 +131,11 @@
                 let num1 = w.num1.as_ref().expect("operands checked");
                 let num2 = w.num2.as_ref().expect("operands checked");
 
-                match op {
-                    &Operation::ADD => Ok(num1 + num2),
-                    &Operation::SUBTRACT => Ok(num1 - num2),
-                    &Operation::MULTIPLY => Ok(num1 * num2),
-                    &Operation::DIVIDE => {
+                match *op {
+                    Operation::ADD => Ok(num1 + num2),
+                    Operation::SUBTRACT => Ok(num1 - num2),
+                    Operation::MULTIPLY => Ok(num1 * num2),
+                    Operation::DIVIDE => {
                         if *num2 == 0 {
                             Err(InvalidOperation {
                                 what_op: Some(op.into()),