diff --git a/crates/ide/Cargo.toml b/crates/ide/Cargo.toml
index 02eb46333be..d09b4a0dafe 100644
--- a/crates/ide/Cargo.toml
+++ b/crates/ide/Cargo.toml
@@ -32,12 +32,14 @@ ide_assists = { path = "../ide_assists", version = "0.0.0" }
 ide_diagnostics = { path = "../ide_diagnostics", version = "0.0.0" }
 ide_ssr = { path = "../ide_ssr", version = "0.0.0" }
 ide_completion = { path = "../ide_completion", version = "0.0.0" }
-toolchain = { path = "../toolchain", version = "0.0.0" }
 
 # ide should depend only on the top-level `hir` package. if you need
 # something from some `hir_xxx` subpackage, reexport the API via `hir`.
 hir = { path = "../hir", version = "0.0.0" }
 
+[target.'cfg(not(any(target_arch = "wasm32", target_os = "emscripten")))'.dependencies]
+toolchain = { path = "../toolchain", version = "0.0.0" }
+
 [dev-dependencies]
 test_utils = { path = "../test_utils" }
 expect-test = "1.2.2"
diff --git a/crates/ide/src/expand_macro.rs b/crates/ide/src/expand_macro.rs
index c93d0561a87..e4061016e60 100644
--- a/crates/ide/src/expand_macro.rs
+++ b/crates/ide/src/expand_macro.rs
@@ -141,7 +141,7 @@ fn format(db: &RootDatabase, kind: SyntaxKind, file_id: FileId, expanded: Syntax
     _format(db, kind, file_id, &expansion).unwrap_or(expansion)
 }
 
-#[cfg(test)]
+#[cfg(any(test, target_arch = "wasm32", target_os = "emscripten"))]
 fn _format(
     _db: &RootDatabase,
     _kind: SyntaxKind,
@@ -151,7 +151,7 @@ fn _format(
     None
 }
 
-#[cfg(not(test))]
+#[cfg(not(any(test, target_arch = "wasm32", target_os = "emscripten")))]
 fn _format(
     db: &RootDatabase,
     kind: SyntaxKind,