diff --git a/Data/Default/Instances/Base.hs b/Data/Default/Instances/Base.hs
--- a/Data/Default/Instances/Base.hs
+++ b/Data/Default/Instances/Base.hs
@@ -29,12 +29,17 @@
 
 -}
 
+{-# LANGUAGE CPP #-}
+
 module Data.Default.Instances.Base (
 -- | This module defines 'Default' instances for the types 'Int', 'Int8',
 -- 'Int16', 'Int32', 'Int64', 'Word', 'Word8', 'Word16', 'Word32', 'Word64',
--- 'Integer', 'Float', 'Double', 'Ratio', 'Complex', '(->)', 'IO', 'Maybe',
--- '()', '[]', 'Ordering', 'Any', 'All', 'Last', 'First', 'Sum', 'Product',
--- 'Endo', 'Dual', and tuples.
+-- 'Integer', 'Float', 'Double', 'Ratio', 'Complex', 'CShort', 'CUShort',
+-- 'CInt', 'CUInt', 'CLong', 'CULong', 'CLLong', 'CULLong', 'CPtrdiff',
+-- 'CSize', 'CSigAtomic', 'CIntPtr', 'CUIntPtr', 'CIntMax', 'CUIntMax',
+-- 'CClock', 'CTime', 'CUSeconds', 'CSUSeconds', 'CFloat', 'CDouble', '(->)',
+-- 'IO', 'Maybe', '()', '[]', 'Ordering', 'Any', 'All', 'Last', 'First', 'Sum',
+-- 'Product', 'Endo', 'Dual', and tuples.
 ) where
 
 import Data.Default.Class
@@ -43,6 +48,7 @@
 import Data.Monoid
 import Data.Ratio
 import Data.Complex
+import Foreign.C.Types
 
 instance Default Int where def = 0
 instance Default Int8 where def = 0
@@ -59,6 +65,30 @@
 instance Default Double where def = 0
 instance (Integral a) => Default (Ratio a) where def = 0
 instance (Default a, RealFloat a) => Default (Complex a) where def = def :+ def
+
+instance Default CShort     where def = 0
+instance Default CUShort    where def = 0
+instance Default CInt       where def = 0
+instance Default CUInt      where def = 0
+instance Default CLong      where def = 0
+instance Default CULong     where def = 0
+instance Default CLLong     where def = 0
+instance Default CULLong    where def = 0
+instance Default CPtrdiff   where def = 0
+instance Default CSize      where def = 0
+instance Default CSigAtomic where def = 0
+instance Default CIntPtr    where def = 0
+instance Default CUIntPtr   where def = 0
+instance Default CIntMax    where def = 0
+instance Default CUIntMax   where def = 0
+instance Default CClock     where def = 0
+instance Default CTime      where def = 0
+#if MIN_VERSION_base(4, 4, 0)
+instance Default CUSeconds  where def = 0
+instance Default CSUSeconds where def = 0
+#endif
+instance Default CFloat     where def = 0
+instance Default CDouble    where def = 0
 
 instance (Default r) => Default (e -> r) where def = const def
 instance (Default a) => Default (IO a) where def = return def
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -14,13 +14,13 @@
   may be used to endorse or promote products derived from this software
   without specific prior written permission.
 
-THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "AS IS" AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/data-default-instances-base.cabal b/data-default-instances-base.cabal
--- a/data-default-instances-base.cabal
+++ b/data-default-instances-base.cabal
@@ -1,5 +1,5 @@
 Name:            data-default-instances-base
-Version:         0.0.1
+Version:         0.1.0
 Cabal-Version:   >= 1.6
 Category:        Data
 Synopsis:        Default instances for types in base