diff --git a/preamble.cabal b/preamble.cabal
--- a/preamble.cabal
+++ b/preamble.cabal
@@ -1,5 +1,5 @@
 name:                  preamble
-version:               0.0.30
+version:               0.0.31
 synopsis:              Yet another prelude.
 description:           A prelude built on basic-prelude.
 homepage:              https://github.com/swift-nav/preamble
diff --git a/src/Preamble/Prelude.hs b/src/Preamble/Prelude.hs
--- a/src/Preamble/Prelude.hs
+++ b/src/Preamble/Prelude.hs
@@ -18,6 +18,7 @@
   , (-|-)
   , (-.-)
   , (-:-)
+  , (=.)
   ) where
 
 import BasicPrelude as Exports hiding (bool)
@@ -90,3 +91,8 @@
 --
 (-:-) :: (IsString s, Monoid s) => s -> s -> s
 (-:-) = (<>) . (<> ":")
+
+-- | For making tags.
+--
+(=.) :: a -> b -> (a, b)
+(=.) = (,)