diff --git a/components/salsa-macros/src/lib.rs b/components/salsa-macros/src/lib.rs
index abb1a5c0..fa0d17ef 100644
--- a/components/salsa-macros/src/lib.rs
+++ b/components/salsa-macros/src/lib.rs
@@ -9,6 +9,7 @@ extern crate quote;
 
 use proc_macro::TokenStream;
 
+mod parenthesized;
 mod query_group;
 
 /// The decorator that defines a salsa "query group" trait. This is a
diff --git a/components/salsa-macros/src/parenthesized.rs b/components/salsa-macros/src/parenthesized.rs
new file mode 100644
index 00000000..e9817644
--- /dev/null
+++ b/components/salsa-macros/src/parenthesized.rs
@@ -0,0 +1,12 @@
+pub(crate) struct Parenthesized<T>(pub T);
+
+impl<T> syn::parse::Parse for Parenthesized<T>
+where
+    T: syn::parse::Parse,
+{
+    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
+        let content;
+        syn::parenthesized!(content in input);
+        content.parse::<T>().map(Parenthesized)
+    }
+}
diff --git a/components/salsa-macros/src/query_group.rs b/components/salsa-macros/src/query_group.rs
index bbc7a9c6..62b4b237 100644
--- a/components/salsa-macros/src/query_group.rs
+++ b/components/salsa-macros/src/query_group.rs
@@ -1,3 +1,4 @@
+use crate::parenthesized::Parenthesized;
 use heck::CamelCase;
 use proc_macro::TokenStream;
 use proc_macro2::Span;
@@ -258,16 +259,3 @@ enum QueryStorage {
     Dependencies,
     Input,
 }
-
-struct Parenthesized<T>(pub T);
-
-impl<T> syn::parse::Parse for Parenthesized<T>
-where
-    T: syn::parse::Parse,
-{
-    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
-        let content;
-        syn::parenthesized!(content in input);
-        content.parse::<T>().map(Parenthesized)
-    }
-}