diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ecd7e6d..91db6a7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,6 +20,9 @@ jobs:
       - name: cargo build (debug; default features)
         run: cargo build --all-targets
 
+      - name: cargo build (debug; all features)
+        run: cargo build --all-targets --all-features
+
       - name: cargo clippy
         run: cargo clippy --all-targets -- -D warnings
 
diff --git a/webpki-roots/Cargo.toml b/webpki-roots/Cargo.toml
index 5348360..029aba0 100644
--- a/webpki-roots/Cargo.toml
+++ b/webpki-roots/Cargo.toml
@@ -22,3 +22,6 @@ webpki = { workspace = true }
 webpki-ccadb = { path = "../webpki-ccadb" }
 x509-parser = { workspace = true }
 yasna = { workspace = true }
+
+[features]
+web = ["pki-types/web"]