diff --git a/src/mapx/misc.go b/src/mapx/misc.go
new file mode 100644
index 0000000..2499c53
--- /dev/null
+++ b/src/mapx/misc.go
@@ -0,0 +1,10 @@
+package mapx
+
+func Reversed[K, V comparable](m map[K] V) map[V] K {
+	r := make(map[V] K)
+	for k, v := range m {
+		r[v] = k
+	}
+	return r
+}
+