diff --git a/src/ast/mod.rs b/src/ast/mod.rs
index c005b31b5..947e23f11 100644
--- a/src/ast/mod.rs
+++ b/src/ast/mod.rs
@@ -1911,7 +1911,8 @@ impl fmt::Display for FetchDirection {
                 f.write_str("FORWARD")?;
 
                 if let Some(l) = limit {
-                    f.write_str(&format!(" {}", l))?;
+                    f.write_str(" ")?;
+                    f.write_str(&l.to_string())?;
                 }
             }
             FetchDirection::ForwardAll => f.write_str("FORWARD ALL")?,
@@ -1919,7 +1920,8 @@ impl fmt::Display for FetchDirection {
                 f.write_str("BACKWARD")?;
 
                 if let Some(l) = limit {
-                    f.write_str(&format!(" {}", l))?;
+                    f.write_str(" ")?;
+                    f.write_str(&l.to_string())?;
                 }
             }
             FetchDirection::BackwardAll => f.write_str("BACKWARD ALL")?,