diff --git a/src/runtime/bake/bake_body.rs b/src/runtime/bake/bake_body.rs
index 6f78303e044..80eb659aca1 100644
--- a/src/runtime/bake/bake_body.rs
+++ b/src/runtime/bake/bake_body.rs
@@ -210,14 +210,21 @@ impl UserOptions {
         }
 
         if let Some(js_options) = get_optional_value(config, global, b"bundlerOptions")? {
+            if !js_options.is_object() {
+                return Err(global.throw_invalid_arguments(format_args!(
+                    "Expected 'bundlerOptions' to be an object"
+                )));
+            }
             if let Some(server_options) = get_optional_value(js_options, global, b"server")? {
-                bundler_options.server = BuildConfigSubset::from_js(global, server_options)?;
+                bundler_options.server =
+                    BuildConfigSubset::from_js(global, server_options, "server")?;
             }
             if let Some(client_options) = get_optional_value(js_options, global, b"client")? {
-                bundler_options.client = BuildConfigSubset::from_js(global, client_options)?;
+                bundler_options.client =
+                    BuildConfigSubset::from_js(global, client_options, "client")?;
             }
             if let Some(ssr_options) = get_optional_value(js_options, global, b"ssr")? {
-                bundler_options.ssr = BuildConfigSubset::from_js(global, ssr_options)?;
+                bundler_options.ssr = BuildConfigSubset::from_js(global, ssr_options, "ssr")?;
             }
         }
 
@@ -408,9 +415,20 @@ pub struct BuildConfigSubset {
 }
 
 impl BuildConfigSubset {
-    pub fn from_js(global: &JSGlobalObject, js_options: JSValue) -> JsResult<BuildConfigSubset> {
+    pub fn from_js(
+        global: &JSGlobalObject,
+        js_options: JSValue,
+        property_name: &str,
+    ) -> JsResult<BuildConfigSubset> {
         let mut options = BuildConfigSubset::default();
 
+        if !js_options.is_object() {
+            return Err(global.throw_invalid_arguments(format_args!(
+                "Expected 'bundlerOptions.{}' to be an object",
+                property_name
+            )));
+        }
+
         'brk: {
             let Some(val) = get_optional_value(js_options, global, b"sourcemap")? else {
                 break 'brk;
@@ -428,25 +446,26 @@ impl BuildConfigSubset {
             ));
         }
 
-        'brk: {
-            let Some(minify_options) = get_optional_value(js_options, global, b"minify")? else {
-                break 'brk;
-            };
-            if minify_options.is_boolean() && minify_options.as_boolean() {
-                options.minify_syntax = Some(minify_options.as_boolean());
-                options.minify_identifiers = Some(minify_options.as_boolean());
-                options.minify_whitespace = Some(minify_options.as_boolean());
-                break 'brk;
-            }
-
-            if let Some(value) = get_boolean_loose(minify_options, global, b"whitespace")? {
-                options.minify_whitespace = Some(value);
-            }
-            if let Some(value) = get_boolean_loose(minify_options, global, b"syntax")? {
+        if let Some(minify_options) = get_optional_value(js_options, global, b"minify")? {
+            if minify_options.is_boolean() {
+                let value = minify_options.as_boolean();
                 options.minify_syntax = Some(value);
-            }
-            if let Some(value) = get_boolean_loose(minify_options, global, b"identifiers")? {
                 options.minify_identifiers = Some(value);
+                options.minify_whitespace = Some(value);
+            } else if minify_options.is_object() {
+                if let Some(value) = get_boolean_loose(minify_options, global, b"whitespace")? {
+                    options.minify_whitespace = Some(value);
+                }
+                if let Some(value) = get_boolean_loose(minify_options, global, b"syntax")? {
+                    options.minify_syntax = Some(value);
+                }
+                if let Some(value) = get_boolean_loose(minify_options, global, b"identifiers")? {
+                    options.minify_identifiers = Some(value);
+                }
+            } else {
+                return Err(global.throw_invalid_arguments(format_args!(
+                    "Expected minify to be a boolean or an object"
+                )));
             }
         }
 
diff --git a/test/js/bun/http/bun-serve-args.test.ts b/test/js/bun/http/bun-serve-args.test.ts
index 54a44c192d3..347c638fc0e 100644
--- a/test/js/bun/http/bun-serve-args.test.ts
+++ b/test/js/bun/http/bun-serve-args.test.ts
@@ -670,3 +670,47 @@ describe("Bun.serve unix socket validation", () => {
     }
   });
 });
+
+describe("app.bundlerOptions validation", () => {
+  test.each([
+    ["bundlerOptions is not an object", { bundlerOptions: 123 }, "Expected 'bundlerOptions' to be an object"],
+    [
+      "bundlerOptions.server is not an object",
+      { bundlerOptions: { server: 123 } },
+      "Expected 'bundlerOptions.server' to be an object",
+    ],
+    [
+      "bundlerOptions.client is not an object",
+      { bundlerOptions: { client: "abc" } },
+      "Expected 'bundlerOptions.client' to be an object",
+    ],
+    [
+      "bundlerOptions.ssr is not an object",
+      { bundlerOptions: { ssr: true } },
+      "Expected 'bundlerOptions.ssr' to be an object",
+    ],
+    [
+      "minify is not a boolean or object",
+      { bundlerOptions: { ssr: { minify: 10 } } },
+      "Expected minify to be a boolean or an object",
+    ],
+  ])("throws when %s", (_, app, message) => {
+    expect(() => {
+      // @ts-expect-error - Testing invalid runtime input
+      serve({ port: 0, app });
+    }).toThrow(
+      expect.objectContaining({
+        name: "TypeError",
+        code: "ERR_INVALID_ARG_TYPE",
+        message,
+      }),
+    );
+  });
+
+  test("minify: false does not crash", () => {
+    expect(() => {
+      // @ts-expect-error - Testing runtime input
+      serve({ port: 0, app: { bundlerOptions: { ssr: { minify: false } } } });
+    }).toThrow("'app' is missing 'framework'");
+  });
+});