diff --git a/lib/core/libimagstore/src/iter.rs b/lib/core/libimagstore/src/iter.rs
index b5d82348..0171a93b 100644
--- a/lib/core/libimagstore/src/iter.rs
+++ b/lib/core/libimagstore/src/iter.rs
@@ -32,10 +32,10 @@ macro_rules! mk_iterator {
         use store::Store;
         use error::Result;
 
-        pub struct $itername<'a>(Box<Iterator<Item = StoreId>>, &'a Store);
+        pub struct $itername<'a>(Box<Iterator<Item = StoreId> + 'a>, &'a Store);
 
         impl<'a> $itername<'a> {
-            pub fn new(inner: Box<Iterator<Item = StoreId>>, store: &'a Store) -> Self {
+            pub fn new(inner: Box<Iterator<Item = StoreId> + 'a>, store: &'a Store) -> Self {
                 $itername(inner, store)
             }
         }
@@ -53,7 +53,7 @@ macro_rules! mk_iterator {
         }
 
         impl<'a, I> $extname<'a> for I
-            where I: Iterator<Item = StoreId> + 'static
+            where I: Iterator<Item = StoreId> + 'a
         {
             fn $extfnname(self, store: &'a Store) -> $itername<'a> {
                 $itername(Box::new(self), store)