diff --git a/.changeset/thirty-dancers-wink.md b/.changeset/thirty-dancers-wink.md
new file mode 100644
index 0000000000..dfe386f44d
--- /dev/null
+++ b/.changeset/thirty-dancers-wink.md
@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Fixes an error when using `astro:transtions/client` without `<ViewTransitions/>`
diff --git a/packages/astro/src/transitions/router.ts b/packages/astro/src/transitions/router.ts
index 69f4e717c3..db5a5ea731 100644
--- a/packages/astro/src/transitions/router.ts
+++ b/packages/astro/src/transitions/router.ts
@@ -622,7 +622,7 @@ const onScrollEnd = () => {
 	// "scrollend" events. To avoid redundant work and expensive calls to
 	// `replaceState()`, we simply check that the values are different before
 	// updating.
-	if (scrollX !== history.state.scrollX || scrollY !== history.state.scrollY) {
+	if (history.state && (scrollX !== history.state.scrollX || scrollY !== history.state.scrollY)) {
 		updateScrollPosition({ scrollX, scrollY });
 	}
 };