diff --git a/.changeset/friendly-pumpkins-reply.md b/.changeset/friendly-pumpkins-reply.md
new file mode 100644
index 000000000000..0a6870e4744b
--- /dev/null
+++ b/.changeset/friendly-pumpkins-reply.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-vercel': patch
+---
+
+fix: move catch-all-regex to the end
diff --git a/packages/adapter-vercel/index.js b/packages/adapter-vercel/index.js
index b91edaa83127..6958975c27df 100644
--- a/packages/adapter-vercel/index.js
+++ b/packages/adapter-vercel/index.js
@@ -216,11 +216,6 @@ const plugin = function (defaults = {}) {
 					/** @type {import('@sveltejs/kit').RouteDefinition<any>[]} */ (group.routes)
 				);
 
-				if (singular) {
-					// Special case: One function for all routes
-					static_config.routes.push({ src: '/.*', dest: `/${name}` });
-				}
-
 				for (const route of group.routes) {
 					functions.set(route.pattern.toString(), name);
 				}
@@ -286,6 +281,12 @@ const plugin = function (defaults = {}) {
 				}
 			}
 
+			if (singular) {
+				// Common case: One function for all routes
+				// Needs to happen after ISR or else regex swallows all other matches
+				static_config.routes.push({ src: '/.*', dest: `/fn` });
+			}
+
 			builder.log.minor('Copying assets...');
 
 			builder.writeClient(dirs.static);