diff --git a/src/gadget.rs b/src/gadget.rs
new file mode 100644
index 0000000..a876ca7
--- /dev/null
+++ b/src/gadget.rs
@@ -0,0 +1 @@
+//! Self-contained circuit implementations of various primitives.
diff --git a/src/lib.rs b/src/lib.rs
index 7e6bcfc..2accaaa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,6 +15,7 @@
 
 pub mod arithmetic;
 pub mod circuit;
+pub mod gadget;
 pub mod pasta;
 pub mod plonk;
 pub mod poly;