diff --git a/Prelude/Unicode.hs b/Prelude/Unicode.hs
--- a/Prelude/Unicode.hs
+++ b/Prelude/Unicode.hs
@@ -17,6 +17,7 @@
     , (⧺)
     , (∈), (∉)
     , (⊥)
+    , ℤ, ℚ
     ) where
 
 
@@ -25,9 +26,10 @@
 -------------------------------------------------------------------------------
 
 -- from base:
-import Prelude ( Num, Floating, Fractional
-               , (/), (*), pi, undefined
-               )
+import Data.Ratio ( Ratio )
+import Prelude    ( Num, Floating, Fractional, Integer
+                  , (/), (*), pi, undefined
+                  )
 
 -- from base-unicode-symbols:
 import Data.Bool.Unicode     ( (∧), (∨), (¬) )
@@ -80,3 +82,18 @@
 -}
 (⊥) ∷ α
 (⊥) = undefined
+
+
+-------------------------------------------------------------------------------
+-- Types
+-------------------------------------------------------------------------------
+
+{-|
+U+2124, DOUBLE-STRUCK CAPITAL Z
+-}
+type ℤ = Integer
+
+{-|
+U+2124, DOUBLE-STRUCK CAPITAL Q
+-}
+type ℚ = Ratio ℤ
diff --git a/base-unicode-symbols.cabal b/base-unicode-symbols.cabal
--- a/base-unicode-symbols.cabal
+++ b/base-unicode-symbols.cabal
@@ -1,5 +1,5 @@
 name:          base-unicode-symbols
-version:       0.2.1.5
+version:       0.2.2
 cabal-version: >=1.6
 build-type:    Simple
 stability:     provisional
@@ -13,8 +13,8 @@
 homepage:      http://haskell.org/haskellwiki/Unicode-symbols
 synopsis:      Unicode alternatives for common functions and operators
 description:
-  This package defines new symbols for a number of functions and
-  operators in the base package.
+  This package defines new symbols for a number of functions,
+  operators and types in the base package.
   .
   All symbols are documented with their actual definition and
   information regarding their Unicode code point. They should be