diff --git a/.changeset/moody-chairs-beam.md b/.changeset/moody-chairs-beam.md
new file mode 100644
index 000000000..8a25ff7d8
--- /dev/null
+++ b/.changeset/moody-chairs-beam.md
@@ -0,0 +1,5 @@
+---
+"@marko/runtime-tags": patch
+---
+
+Fix issue where details and dialog elements were incorrectly running change handlers when the value had not changed.
diff --git a/.sizes.json b/.sizes.json
index cfb21259b..155e1700a 100644
--- a/.sizes.json
+++ b/.sizes.json
@@ -7,7 +7,7 @@
     {
       "name": "*",
       "total": {
-        "min": 18364,
+        "min": 18373,
         "brotli": 6749
       }
     },
diff --git a/.sizes/dom.js b/.sizes/dom.js
index 227713563..aca636a8a 100644
--- a/.sizes/dom.js
+++ b/.sizes/dom.js
@@ -1,4 +1,4 @@
-// size: 18364 (min) 6749 (brotli)
+// size: 18373 (min) 6749 (brotli)
 var empty = [],
   rest = Symbol();
 function attrTag(attrs2) {
@@ -446,7 +446,8 @@ function controllable_detailsOrDialog_open(
 ) {
   (scope[nodeAccessor + ";"] = openChange),
     (scope[nodeAccessor + "="] = openChange ? 4 : 5),
-    (scope[nodeAccessor].open = normalizeBoolProp(open));
+    (scope[nodeAccessor].open = scope[nodeAccessor + ":"] =
+      normalizeBoolProp(open));
 }
 function controllable_detailsOrDialog_open_effect(scope, nodeAccessor) {
   let el = scope[nodeAccessor],
diff --git a/packages/runtime-tags/src/dom/controllable.ts b/packages/runtime-tags/src/dom/controllable.ts
index 524c27e98..cf966b9ae 100644
--- a/packages/runtime-tags/src/dom/controllable.ts
+++ b/packages/runtime-tags/src/dom/controllable.ts
@@ -259,7 +259,9 @@ export function controllable_detailsOrDialog_open(
     scope[nodeAccessor + AccessorChar.ControlledType] = ControlledType.None;
   }
 
-  (scope[nodeAccessor] as HTMLDetailsElement).open = normalizeBoolProp(open);
+  (scope[nodeAccessor] as HTMLDetailsElement).open = scope[
+    nodeAccessor + AccessorChar.ControlledValue
+  ] = normalizeBoolProp(open);
 }
 export function controllable_detailsOrDialog_open_effect(
   scope: Scope,