diff --git a/src/builtin/builtin.go b/src/builtin/builtin.go
index d3637584fe990..bcfb7ce956320 100644
--- a/src/builtin/builtin.go
+++ b/src/builtin/builtin.go
@@ -227,6 +227,15 @@ func real(c ComplexType) FloatType
 // the type of c.
 func imag(c ComplexType) FloatType
 
+// The clear built-in function clears maps and slices.
+// For maps, clear deletes all entries, resulting in an empty map.
+// For slices, clear sets all elements up to the length of the slice
+// to the zero value of the respective element type. If the argument
+// type is a type parameter, the type parameter's type set must
+// contain only map or slice types, and clear performs the operation
+// implied by the type argument.
+func clear[T ~[]Type | ~map[Type]Type1](t T)
+
 // The close built-in function closes a channel, which must be either
 // bidirectional or send-only. It should be executed only by the sender,
 // never the receiver, and has the effect of shutting down the channel after