diff --git a/Cargo.toml b/Cargo.toml
index 45473c90..d5efdc13 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,6 @@ edition = "2018"
 
 [package.metadata.docs.rs]
 features = ["serde-serialize"]
-rustc-args = ["--cfg=web_sys_unstable_apis"]
 
 [lib]
 test = false
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 2261d673..6ee46572 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -328,7 +328,7 @@ jobs:
       - script: cargo doc --no-deps --manifest-path crates/web-sys/Cargo.toml --all-features
         displayName: "Document web-sys"
         env:
-          RUSTFLAGS: --cfg=web_sys_unstable_apis
+          RUSTDOCFLAGS: --cfg=web_sys_unstable_apis
       - script: cargo doc --no-deps --manifest-path crates/futures/Cargo.toml
         displayName: "Document wasm-bindgen-futures"
       # Make a tarball even though a zip is uploaded, it looks like the tarball
diff --git a/crates/web-sys/Cargo.toml b/crates/web-sys/Cargo.toml
index 75fc4fa0..fc1342a5 100644
--- a/crates/web-sys/Cargo.toml
+++ b/crates/web-sys/Cargo.toml
@@ -14,6 +14,7 @@ edition = "2018"
 
 [package.metadata.docs.rs]
 all-features = true
+rustdoc-args = ["--cfg=web_sys_unstable_apis"]
 
 [lib]
 doctest = false