diff --git a/rslib/src/backend/config.rs b/rslib/src/backend/config.rs
index c9fe7665b..9304dc4fd 100644
--- a/rslib/src/backend/config.rs
+++ b/rslib/src/backend/config.rs
@@ -1,22 +1,35 @@
 // Copyright: Ankitects Pty Ltd and contributors
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
-use crate::{backend_proto as pb, config::BoolKey};
-use pb::config::bool::Key;
+use crate::{
+    backend_proto as pb,
+    config::{BoolKey, StringKey},
+};
+use pb::config::bool::Key as BoolKeyProto;
+use pb::config::string::Key as StringKeyProto;
 
-impl From<Key> for BoolKey {
-    fn from(k: Key) -> Self {
+impl From<BoolKeyProto> for BoolKey {
+    fn from(k: BoolKeyProto) -> Self {
         match k {
-            Key::BrowserSortBackwards => BoolKey::BrowserSortBackwards,
-            Key::PreviewBothSides => BoolKey::PreviewBothSides,
-            Key::CollapseTags => BoolKey::CollapseTags,
-            Key::CollapseNotetypes => BoolKey::CollapseNotetypes,
-            Key::CollapseDecks => BoolKey::CollapseDecks,
-            Key::CollapseSavedSearches => BoolKey::CollapseSavedSearches,
-            Key::CollapseToday => BoolKey::CollapseToday,
-            Key::CollapseCardState => BoolKey::CollapseCardState,
-            Key::CollapseFlags => BoolKey::CollapseFlags,
-            Key::Sched2021 => BoolKey::Sched2021,
+            BoolKeyProto::BrowserSortBackwards => BoolKey::BrowserSortBackwards,
+            BoolKeyProto::PreviewBothSides => BoolKey::PreviewBothSides,
+            BoolKeyProto::CollapseTags => BoolKey::CollapseTags,
+            BoolKeyProto::CollapseNotetypes => BoolKey::CollapseNotetypes,
+            BoolKeyProto::CollapseDecks => BoolKey::CollapseDecks,
+            BoolKeyProto::CollapseSavedSearches => BoolKey::CollapseSavedSearches,
+            BoolKeyProto::CollapseToday => BoolKey::CollapseToday,
+            BoolKeyProto::CollapseCardState => BoolKey::CollapseCardState,
+            BoolKeyProto::CollapseFlags => BoolKey::CollapseFlags,
+            BoolKeyProto::Sched2021 => BoolKey::Sched2021,
+        }
+    }
+}
+
+impl From<StringKeyProto> for StringKey {
+    fn from(k: StringKeyProto) -> Self {
+        match k {
+            StringKeyProto::SetDueBrowser => StringKey::SetDueBrowser,
+            StringKeyProto::SetDueReviewer => StringKey::SetDueReviewer,
         }
     }
 }
diff --git a/rslib/src/backend/mod.rs b/rslib/src/backend/mod.rs
index 02133ad31..14f3e5b28 100644
--- a/rslib/src/backend/mod.rs
+++ b/rslib/src/backend/mod.rs
@@ -1527,14 +1527,16 @@ impl BackendService for Backend {
     fn get_config_string(&self, input: pb::config::String) -> BackendResult<pb::String> {
         self.with_col(|col| {
             Ok(pb::String {
-                val: col.get_string(input),
+                val: col.get_string(input.key().into()),
             })
         })
     }
 
     fn set_config_string(&self, input: pb::SetConfigStringIn) -> BackendResult<pb::Empty> {
-        self.with_col(|col| col.transact(None, |col| col.set_string(input)))
-            .map(Into::into)
+        self.with_col(|col| {
+            col.transact(None, |col| col.set_string(input.key().into(), &input.value))
+        })
+        .map(Into::into)
     }
 
     fn get_preferences(&self, _input: Empty) -> BackendResult<pb::Preferences> {
diff --git a/rslib/src/config.rs b/rslib/src/config.rs
index 35712c0e3..fbc12d5f6 100644
--- a/rslib/src/config.rs
+++ b/rslib/src/config.rs
@@ -2,10 +2,9 @@
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 use crate::{
-    backend_proto as pb, collection::Collection, decks::DeckID, err::Result, notetype::NoteTypeID,
+    collection::Collection, decks::DeckID, err::Result, notetype::NoteTypeID,
     timestamp::TimestampSecs,
 };
-pub use pb::config::string::Key as StringKey;
 use serde::{de::DeserializeOwned, Serialize};
 use serde_aux::field_attributes::deserialize_bool_from_anything;
 use serde_derive::Deserialize;
@@ -45,8 +44,6 @@ pub(crate) enum ConfigKey {
     FirstDayOfWeek,
     LocalOffset,
     Rollover,
-    SetDueBrowser,
-    SetDueReviewer,
 
     #[strum(to_string = "timeLim")]
     AnswerTimeLimitSecs,
@@ -95,13 +92,11 @@ pub enum BoolKey {
     ShowRemainingDueCountsInStudy,
 }
 
-impl From<StringKey> for ConfigKey {
-    fn from(key: StringKey) -> Self {
-        match key {
-            StringKey::SetDueBrowser => ConfigKey::SetDueBrowser,
-            StringKey::SetDueReviewer => ConfigKey::SetDueReviewer,
-        }
-    }
+#[derive(Debug, Clone, Copy, IntoStaticStr)]
+#[strum(serialize_all = "camelCase")]
+pub enum StringKey {
+    SetDueBrowser,
+    SetDueReviewer,
 }
 
 #[derive(PartialEq, Serialize_repr, Deserialize_repr, Clone, Copy, Debug)]
@@ -180,6 +175,20 @@ impl Collection {
         self.set_config(key, &value)
     }
 
+    pub(crate) fn get_string(&self, key: StringKey) -> String {
+        let default = match key {
+            StringKey::SetDueBrowser => "0",
+            StringKey::SetDueReviewer => "1",
+            // other => "",
+        };
+        self.get_config_optional(key)
+            .unwrap_or_else(|| default.to_string())
+    }
+
+    pub(crate) fn set_string(&self, key: StringKey, val: &str) -> Result<()> {
+        self.set_config(key, &val)
+    }
+
     pub(crate) fn get_browser_sort_kind(&self) -> SortKind {
         self.get_config_default(ConfigKey::BrowserSortKind)
     }
@@ -300,21 +309,6 @@ impl Collection {
     pub(crate) fn set_last_unburied_day(&self, day: u32) -> Result<()> {
         self.set_config(ConfigKey::LastUnburiedDay, &day)
     }
-
-    pub(crate) fn get_string(&self, config: pb::config::String) -> String {
-        let key = config.key();
-        let default = match key {
-            StringKey::SetDueBrowser => "0",
-            StringKey::SetDueReviewer => "1",
-            // other => "",
-        };
-        self.get_config_optional(ConfigKey::from(key))
-            .unwrap_or_else(|| default.to_string())
-    }
-
-    pub(crate) fn set_string(&self, input: pb::SetConfigStringIn) -> Result<()> {
-        self.set_config(ConfigKey::from(input.key()), &input.value)
-    }
 }
 
 #[derive(Deserialize, PartialEq, Debug, Clone, Copy)]