diff --git a/src/ecmascript/mujs/window.cpp b/src/ecmascript/mujs/window.cpp
index 2a247df1..21b478e0 100644
--- a/src/ecmascript/mujs/window.cpp
+++ b/src/ecmascript/mujs/window.cpp
@@ -25,6 +25,7 @@
 #include "ecmascript/timer.h"
 #include "intl/libintl.h"
 #include "main/select.h"
+#include "main/timer.h"
 #include "osdep/newwin.h"
 #include "osdep/sysname.h"
 #include "protocol/http/http.h"
@@ -194,17 +195,11 @@ mjs_window_clearTimeout(js_State *J)
 	timer_id_T id = reinterpret_cast<timer_id_T>(number);
 
 	if (found_in_map_timer(id)) {
-		struct ecmascript_timeout *t;
-
-		foreach (t, interpreter->vs->doc_view->document->timeouts) {
-			if (id == t->tid) {
-				kill_timer(&t->tid);
-				done_string(&t->code);
-				del_from_list(t);
-				mem_free(t);
-				break;
-			}
-		}
+		struct ecmascript_timeout *t = (struct ecmascript_timeout *)(id->data);
+		kill_timer(&t->tid);
+		done_string(&t->code);
+		del_from_list(t);
+		mem_free(t);
 	}
 	js_pushundefined(J);
 }
diff --git a/src/ecmascript/quickjs/window.cpp b/src/ecmascript/quickjs/window.cpp
index a998ec26..e1ea34f7 100644
--- a/src/ecmascript/quickjs/window.cpp
+++ b/src/ecmascript/quickjs/window.cpp
@@ -25,6 +25,7 @@
 #include "ecmascript/timer.h"
 #include "intl/libintl.h"
 #include "main/select.h"
+#include "main/timer.h"
 #include "osdep/newwin.h"
 #include "osdep/sysname.h"
 #include "protocol/http/http.h"
@@ -247,17 +248,11 @@ js_window_clearTimeout(JSContext *ctx, JSValueConst this_val, int argc, JSValueC
 	timer_id_T id = reinterpret_cast<timer_id_T>(number);
 
 	if (found_in_map_timer(id)) {
-		struct ecmascript_timeout *t;
-
-		foreach (t, interpreter->vs->doc_view->document->timeouts) {
-			if (id == t->tid) {
-				kill_timer(&t->tid);
-				done_string(&t->code);
-				del_from_list(t);
-				mem_free(t);
-				break;
-			}
-		}
+		struct ecmascript_timeout *t = (struct ecmascript_timeout *)(id->data);
+		kill_timer(&t->tid);
+		done_string(&t->code);
+		del_from_list(t);
+		mem_free(t);
 	}
 
 	return JS_UNDEFINED;
diff --git a/src/ecmascript/spidermonkey/window.cpp b/src/ecmascript/spidermonkey/window.cpp
index a6578dc3..546d86c8 100644
--- a/src/ecmascript/spidermonkey/window.cpp
+++ b/src/ecmascript/spidermonkey/window.cpp
@@ -28,6 +28,7 @@
 #include "ecmascript/timer.h"
 #include "intl/libintl.h"
 #include "main/select.h"
+#include "main/timer.h"
 #include "osdep/newwin.h"
 #include "osdep/sysname.h"
 #include "protocol/http/http.h"
@@ -407,17 +408,11 @@ window_clearTimeout(JSContext *ctx, unsigned int argc, JS::Value *rval)
 	timer_id_T id = reinterpret_cast<timer_id_T>(number);
 
 	if (found_in_map_timer(id)) {
-		struct ecmascript_timeout *t;
-
-		foreach (t, interpreter->vs->doc_view->document->timeouts) {
-			if (id == t->tid) {
-				kill_timer(&t->tid);
-				done_string(&t->code);
-				del_from_list(t);
-				mem_free(t);
-				break;
-			}
-		}
+		struct ecmascript_timeout *t = (struct ecmascript_timeout *)(id->data);
+		kill_timer(&t->tid);
+		done_string(&t->code);
+		del_from_list(t);
+		mem_free(t);
 	}
 	return true;
 }
diff --git a/src/main/timer.cpp b/src/main/timer.cpp
index 739043ac..d2cafd31 100644
--- a/src/main/timer.cpp
+++ b/src/main/timer.cpp
@@ -37,14 +37,6 @@
 #include "ecmascript/timer.h"
 #endif
 
-struct timer {
-	LIST_HEAD(struct timer);
-
-	timeval_T interval;
-	void (*func)(void *);
-	void *data;
-};
-
 /* @timers.next points to the timer with the smallest interval,
  * @timers.next->next to the second smallest, and so on.  */
 static INIT_LIST_OF(struct timer, timers);
diff --git a/src/main/timer.h b/src/main/timer.h
index 54cd6537..3c9fabf4 100644
--- a/src/main/timer.h
+++ b/src/main/timer.h
@@ -1,14 +1,20 @@
 #ifndef EL__MAIN_TIMER_H
 #define EL__MAIN_TIMER_H
 
+#include "util/lists.h"
 #include "util/time.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/* Only available internally. */
-struct timer;
+struct timer {
+	LIST_HEAD(struct timer);
+
+	timeval_T interval;
+	void (*func)(void *);
+	void *data;
+};
 
 /* Little hack, timer_id_T is in fact a pointer to the timer, so
  * it has to be of a pointer type.