diff --git a/exercises/02_functions/functions3.rs b/exercises/02_functions/functions3.rs
index 5d5122af..8d654772 100644
--- a/exercises/02_functions/functions3.rs
+++ b/exercises/02_functions/functions3.rs
@@ -1,4 +1,4 @@
-fn call_me(num: u32) {
+fn call_me(num: u8) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }
diff --git a/solutions/02_functions/functions3.rs b/solutions/02_functions/functions3.rs
index c581c425..ce5fe8eb 100644
--- a/solutions/02_functions/functions3.rs
+++ b/solutions/02_functions/functions3.rs
@@ -1,4 +1,4 @@
-fn call_me(num: u32) {
+fn call_me(num: u8) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }