diff --git a/tutorial/rs/Makefile.am b/tutorial/rs/Makefile.am
index 666331e..4aa05da 100644
--- a/tutorial/rs/Makefile.am
+++ b/tutorial/rs/Makefile.am
@@ -24,6 +24,7 @@
 
 all-local: gen-rs/tutorial.rs
 	$(CARGO) build
+	$(CARGO) fmt --all -- --check
 	[ -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 b6ed7a1..ad16ab6 100644
--- a/tutorial/rs/src/bin/tutorial_server.rs
+++ b/tutorial/rs/src/bin/tutorial_server.rs
@@ -144,7 +144,7 @@
                         } else {
                             Ok(num1 / num2)
                         }
-                    },
+                    }
                     _ => {
                         let op_val: i32 = op.into();
                         Err(InvalidOperation {