diff --git a/src/uu/factor/src/factor.rs b/src/uu/factor/src/factor.rs
index 493d60912..c3c8dd674 100644
--- a/src/uu/factor/src/factor.rs
+++ b/src/uu/factor/src/factor.rs
@@ -44,7 +44,8 @@ impl Factors {
 
     fn add(&mut self, prime: u64, exp: u8) {
         assert!(exp > 0);
-        self.f.insert(prime, exp + self.f.get(&prime).unwrap_or(&0));
+        let n = *self.f.get(&prime).unwrap_or(&0);
+        self.f.insert(prime, exp + n);
     }
 
     fn push(&mut self, prime: u64) {