diff --git a/util/src/kvdb.rs b/util/src/kvdb.rs
index fa74553fb..2866925cb 100644
--- a/util/src/kvdb.rs
+++ b/util/src/kvdb.rs
@@ -55,7 +55,7 @@ pub struct DatabaseIterator<'a> {
 impl<'a> Iterator for DatabaseIterator<'a> {
     type Item = (Box<[u8]>, Box<[u8]>);
 
-	#[allow(type_complexity)]
+	#[cfg_attr(feature="dev", allow(type_complexity))]
     fn next(&mut self) -> Option<(Box<[u8]>, Box<[u8]>)> {
 		self.iter.next()
 	}