diff --git a/crates/timers/src/callback.rs b/crates/timers/src/callback.rs
index eaa7d5ce..6561f8af 100644
--- a/crates/timers/src/callback.rs
+++ b/crates/timers/src/callback.rs
@@ -12,11 +12,11 @@ extern "C" {
     #[wasm_bindgen(js_name = "setInterval", catch)]
     fn set_interval(handler: &Function, timeout: i32) -> Result<i32, JsValue>;
 
-    #[wasm_bindgen(js_name = "clearTimeout")]
-    fn clear_timeout(handle: i32);
+    #[wasm_bindgen(js_name = "clearTimeout", catch)]
+    fn clear_timeout(handle: i32) -> Result<(), JsValue>;
 
-    #[wasm_bindgen(js_name = "clearInterval")]
-    fn clear_interval(handle: i32);
+    #[wasm_bindgen(js_name = "clearInterval", catch)]
+    fn clear_interval(handle: i32) -> Result<(), JsValue>;
 }
 
 /// A scheduled timeout.
@@ -35,7 +35,7 @@ pub struct Timeout {
 impl Drop for Timeout {
     fn drop(&mut self) {
         if let Some(id) = self.id {
-            clear_timeout(id);
+            clear_timeout(id).unwrap_throw();
         }
     }
 }
@@ -135,7 +135,7 @@ pub struct Interval {
 impl Drop for Interval {
     fn drop(&mut self) {
         if let Some(id) = self.id {
-            clear_interval(id);
+            clear_interval(id).unwrap_throw();
         }
     }
 }