diff --git a/cranelift/docs/ir.rst b/cranelift/docs/ir.rst
index 5925f4e601..c86e7fb3a0 100644
--- a/cranelift/docs/ir.rst
+++ b/cranelift/docs/ir.rst
@@ -460,6 +460,7 @@ preamble`:
 
 .. autoinst:: call
 .. autoinst:: x_return
+.. autoinst:: fallthrough_return
 
 This simple example illustrates direct function calls and signatures: