diff --git a/Cargo.toml b/Cargo.toml
index 7a211258..ca4359d1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,8 @@ test = false
 doctest = false
 
 [features]
-default = ["std"]
+default = ["spans", "std"]
+spans = ["wasm-bindgen-macro/spans"]
 std = []
 
 [dependencies]
diff --git a/crates/backend/Cargo.toml b/crates/backend/Cargo.toml
index a8b78e5a..9db98563 100644
--- a/crates/backend/Cargo.toml
+++ b/crates/backend/Cargo.toml
@@ -10,9 +10,12 @@ description = """
 Backend code generation of the wasm-bindgen tool
 """
 
+[features]
+spans = ["proc-macro2/nightly"]
+
 [dependencies]
 quote = '0.5'
-proc-macro2 = { version = "0.3", features = ["nightly"] }
+proc-macro2 = "0.3"
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.5" }
 syn = { version = '0.13', features = ['full', 'visit-mut'] }
 serde_json = "1.0"
diff --git a/crates/macro/Cargo.toml b/crates/macro/Cargo.toml
index 7d378796..b78ed2ca 100644
--- a/crates/macro/Cargo.toml
+++ b/crates/macro/Cargo.toml
@@ -13,10 +13,13 @@ Definition of the `#[wasm_bindgen]` attribute, an internal dependency
 [lib]
 proc-macro = true
 
+[features]
+spans = ["proc-macro2/nightly", "wasm-bindgen-backend/spans"]
+
 [dependencies]
 syn = { version = '0.13', features = ['full'] }
 quote = '0.5'
-proc-macro2 = { version = "0.3", features = ["nightly"] }
+proc-macro2 = "0.3"
 serde_json = "1"
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.5" }
 wasm-bindgen-backend = { path = "../backend", version = "=0.2.5" }