diff --git a/src/runtime.rs b/src/runtime.rs
index d63ba8c9..a06350bc 100644
--- a/src/runtime.rs
+++ b/src/runtime.rs
@@ -37,13 +37,6 @@ pub struct Runtime<DB: Database> {
     shared_state: Arc<SharedState<DB>>,
 }
 
-impl<DB> std::panic::RefUnwindSafe for Runtime<DB>
-where
-    DB: Database,
-    DB::DatabaseStorage: std::panic::RefUnwindSafe,
-{
-}
-
 impl<DB> Default for Runtime<DB>
 where
     DB: Database,
@@ -446,6 +439,13 @@ struct SharedState<DB: Database> {
     dependency_graph: Mutex<DependencyGraph<DB>>,
 }
 
+impl<DB> std::panic::RefUnwindSafe for SharedState<DB>
+where
+    DB: Database,
+    DB::DatabaseStorage: std::panic::RefUnwindSafe,
+{
+}
+
 impl<DB: Database> Default for SharedState<DB> {
     fn default() -> Self {
         SharedState {
diff --git a/src/runtime/local_state.rs b/src/runtime/local_state.rs
index 496d3afc..a3d893d0 100644
--- a/src/runtime/local_state.rs
+++ b/src/runtime/local_state.rs
@@ -80,6 +80,8 @@ impl<DB: Database> LocalState<DB> {
     }
 }
 
+impl<DB> std::panic::RefUnwindSafe for LocalState<DB> where DB: Database {}
+
 /// When a query is pushed onto the `active_query` stack, this guard
 /// is returned to represent its slot. The guard can be used to pop
 /// the query from the stack -- in the case of unwinding, the guard's