diff --git a/rust/src/p0035.rs b/rust/src/p0035.rs
index 79838f3e..8dda94ad 100644
--- a/rust/src/p0035.rs
+++ b/rust/src/p0035.rs
@@ -43,7 +43,7 @@ impl Iterator for Rotations {
 
     fn next(&mut self) -> Option<Self::Item> {
         if self.i < self.x.len() {
-            let result = (self.x[self.i..] + self.x[..self.i]).parse::<u64>().unwrap();
+            let result = (format!("{self.x[self.i..]}{self.x[..self.i]}")).parse::<u64>().unwrap();
             self.i += 1;
             return Some(result);
         }
diff --git a/rust/src/p0041.rs b/rust/src/p0041.rs
index 3048e330..0fbe99f9 100644
--- a/rust/src/p0041.rs
+++ b/rust/src/p0041.rs
@@ -22,7 +22,7 @@ pub fn p0041() -> Answer {
         if num_digits > 7 {
             break;
         }
-        if cur_digits.bytes().any(|b| ((b - b'0').into() > num_digits || cur_digits.bytes().filter(|c| c == b).count() != 1)) {
+        if cur_digits.bytes().any(|b| ((b - b'0').into() > num_digits || cur_digits.bytes().filter(|c| *c == b).count() != 1)) {
             continue;
         }
         if p > answer {