diff --git a/src/client_server/directory.rs b/src/client_server/directory.rs
index dfef34d..be5501a 100644
--- a/src/client_server/directory.rs
+++ b/src/client_server/directory.rs
@@ -160,15 +160,12 @@ pub async fn get_public_rooms_filtered_helper(
                 .map(|c| {
                     // Convert ruma::api::federation::directory::get_public_rooms::v1::PublicRoomsChunk
                     // to ruma::api::client::r0::directory::PublicRoomsChunk
-                    Ok::<_, Error>(
-                        serde_json::from_str(
-                            &serde_json::to_string(&c)
-                                .expect("PublicRoomsChunk::to_string always works"),
-                        )
-                        .expect("federation and client-server PublicRoomsChunk are the same type"),
+                    serde_json::from_str(
+                        &serde_json::to_string(&c)
+                            .expect("PublicRoomsChunk::to_string always works"),
                     )
+                    .expect("federation and client-server PublicRoomsChunk are the same type")
                 })
-                .filter_map(|r| r.ok())
                 .collect(),
             prev_batch: response.prev_batch,
             next_batch: response.next_batch,
diff --git a/src/database/rooms.rs b/src/database/rooms.rs
index 7bb019e..f19d4b9 100644
--- a/src/database/rooms.rs
+++ b/src/database/rooms.rs
@@ -2023,39 +2023,33 @@ impl Rooms {
             .map(str::to_lowercase)
             .collect::<Vec<_>>();
 
-        let iterators = words
-            .clone()
-            .into_iter()
-            .map(move |word| {
-                let mut prefix2 = prefix.clone();
-                prefix2.extend_from_slice(word.as_bytes());
-                prefix2.push(0xff);
+        let iterators = words.clone().into_iter().map(move |word| {
+            let mut prefix2 = prefix.clone();
+            prefix2.extend_from_slice(word.as_bytes());
+            prefix2.push(0xff);
 
-                let mut last_possible_id = prefix2.clone();
-                last_possible_id.extend_from_slice(&u64::MAX.to_be_bytes());
+            let mut last_possible_id = prefix2.clone();
+            last_possible_id.extend_from_slice(&u64::MAX.to_be_bytes());
 
-                Ok::<_, Error>(
-                    self.tokenids
-                        .iter_from(&last_possible_id, true) // Newest pdus first
-                        .take_while(move |(k, _)| k.starts_with(&prefix2))
-                        .map(|(key, _)| {
-                            let pduid_index = key
-                                .iter()
-                                .enumerate()
-                                .filter(|(_, &b)| b == 0xff)
-                                .nth(1)
-                                .ok_or_else(|| Error::bad_database("Invalid tokenid in db."))?
-                                .0
-                                + 1; // +1 because the pdu id starts AFTER the separator
+            self.tokenids
+                .iter_from(&last_possible_id, true) // Newest pdus first
+                .take_while(move |(k, _)| k.starts_with(&prefix2))
+                .map(|(key, _)| {
+                    let pduid_index = key
+                        .iter()
+                        .enumerate()
+                        .filter(|(_, &b)| b == 0xff)
+                        .nth(1)
+                        .ok_or_else(|| Error::bad_database("Invalid tokenid in db."))?
+                        .0
+                        + 1; // +1 because the pdu id starts AFTER the separator
 
-                            let pdu_id = key[pduid_index..].to_vec();
+                    let pdu_id = key[pduid_index..].to_vec();
 
-                            Ok::<_, Error>(pdu_id)
-                        })
-                        .filter_map(|r| r.ok()),
-                )
-            })
-            .filter_map(|r| r.ok());
+                    Ok::<_, Error>(pdu_id)
+                })
+                .filter_map(|r| r.ok())
+        });
 
         Ok((
             utils::common_elements(iterators, |a, b| {
diff --git a/src/server_server.rs b/src/server_server.rs
index 6d074ec..961cc9d 100644
--- a/src/server_server.rs
+++ b/src/server_server.rs
@@ -532,15 +532,11 @@ pub async fn get_public_rooms_filtered_route(
             .map(|c| {
                 // Convert ruma::api::federation::directory::get_public_rooms::v1::PublicRoomsChunk
                 // to ruma::api::client::r0::directory::PublicRoomsChunk
-                Ok::<_, Error>(
-                    serde_json::from_str(
-                        &serde_json::to_string(&c)
-                            .expect("PublicRoomsChunk::to_string always works"),
-                    )
-                    .expect("federation and client-server PublicRoomsChunk are the same type"),
+                serde_json::from_str(
+                    &serde_json::to_string(&c).expect("PublicRoomsChunk::to_string always works"),
                 )
+                .expect("federation and client-server PublicRoomsChunk are the same type")
             })
-            .filter_map(|r| r.ok())
             .collect(),
         prev_batch: response.prev_batch,
         next_batch: response.next_batch,
@@ -580,15 +576,11 @@ pub async fn get_public_rooms_route(
             .map(|c| {
                 // Convert ruma::api::federation::directory::get_public_rooms::v1::PublicRoomsChunk
                 // to ruma::api::client::r0::directory::PublicRoomsChunk
-                Ok::<_, Error>(
-                    serde_json::from_str(
-                        &serde_json::to_string(&c)
-                            .expect("PublicRoomsChunk::to_string always works"),
-                    )
-                    .expect("federation and client-server PublicRoomsChunk are the same type"),
+                serde_json::from_str(
+                    &serde_json::to_string(&c).expect("PublicRoomsChunk::to_string always works"),
                 )
+                .expect("federation and client-server PublicRoomsChunk are the same type")
             })
-            .filter_map(|r| r.ok())
             .collect(),
         prev_batch: response.prev_batch,
         next_batch: response.next_batch,