diff --git a/flat.go b/flat.go
index a070da9..9d112f8 100644
--- a/flat.go
+++ b/flat.go
@@ -15,7 +15,7 @@ func FlatSlice[T any](source <-chan []T) <-chan T {
 	return out
 }
 
-func FlatChan[T any](source <-chan chan T) <-chan T {
+func FlatChan[T any](source <-chan <-chan T) <-chan T {
 	out := make(chan T, cap(source))
 
 	go func() {