diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index d08eb81..7ab92a8 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -17,6 +17,11 @@ jobs:
           toolchain: stable
           override: true
 
+      - name: Run cargo check no-feature
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+
       - name: Run cargo check isahc
         uses: actions-rs/cargo@v1
         with:
diff --git a/Cargo.lock b/Cargo.lock
index a51c2b6..90335e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -914,7 +914,7 @@ dependencies = [
 
 [[package]]
 name = "roctogen"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "base64",
  "cfg-if 0.1.10",
diff --git a/Cargo.toml b/Cargo.toml
index 081a5d2..a14cbee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "roctogen"
-version = "0.2.1"
+version = "0.2.2"
 authors = [ "Roctogen contributors" ]
 description = "Github API and models generated from the official swagger OpenAPI specification"
 license = "Apache-2.0"
diff --git a/src/adapters/mod.rs b/src/adapters/mod.rs
index fd864fd..d319938 100644
--- a/src/adapters/mod.rs
+++ b/src/adapters/mod.rs
@@ -84,7 +84,21 @@ pub(crate) async fn fetch_async(
     not(feature = "ureq"),
     not(target_arch = "wasm32")
 ))]
-pub(crate) type FromJsonType = Vec<u8>;
+pub(crate) fn to_json<E: for<'de> Deserialize<'de>>(
+    _res: http::Response<Vec<u8>>,
+) -> Result<E, AdapterError> {
+    unimplemented!("Use a client adapter feature, or target wasm");
+}
+
+#[cfg(all(
+    not(feature = "isahc"),
+    not(feature = "reqwest"),
+    not(feature = "ureq"),
+    not(target_arch = "wasm32")
+))]
+pub(crate) async fn to_json_async<E: for<'de> Deserialize<'de>>(_res: http::Response<Vec<u8>>) -> Result<E, AdapterError> {
+    unimplemented!("Use a client adapter feature, or target wasm");
+}
 
 #[cfg(all(
     not(feature = "isahc"),
@@ -108,8 +122,8 @@ impl GitHubResponseExt for http::Response<Vec<u8>> {
     not(feature = "ureq"),
     not(target_arch = "wasm32")
 ))]
-impl<T> GitHubRequestBuilder<T> for http::Request<Vec<u8>> {
-    fn build(_req: GitHubRequest<T>, _auth: &Auth) -> Result<Self, AdapterError> {
+impl GitHubRequestBuilder<Vec<u8>> for http::Request<Vec<u8>> {
+    fn build(_req: GitHubRequest<Vec<u8>>, _auth: &Auth) -> Result<Self, AdapterError> {
         unimplemented!("Use a client adapter feature, or target wasm");
     }
 }