diff --git a/roaring/src/bitmap/store/bitmap_store.rs b/roaring/src/bitmap/store/bitmap_store.rs
index 91b432bc..aaeb99d6 100644
--- a/roaring/src/bitmap/store/bitmap_store.rs
+++ b/roaring/src/bitmap/store/bitmap_store.rs
@@ -394,7 +394,7 @@ impl Display for Error {
     fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
         match self.kind {
             ErrorKind::Cardinality { expected, actual } => {
-                write!(f, "Expected cardinality was {} but was {}", expected, actual)
+                write!(f, "Expected cardinality was {expected} but was {actual}")
             }
         }
     }