diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7af2119..c51a97e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Pending
+ * Now distinguish between `BigInteger` and `BigInt` on thawing (previously both thawed to `BigInt`s). (mlacorte).
+
+
 ## v2.6.0-alpha2 / 2014-Jan-23
 
 **WARNING**: This is an **EXPERIMENTAL early testing release** and **unsuitable for use in production**. Welcoming feedback on any issues, etc.!
diff --git a/src/taoensso/nippy.clj b/src/taoensso/nippy.clj
index 00b47c4..3d72a0c 100644
--- a/src/taoensso/nippy.clj
+++ b/src/taoensso/nippy.clj
@@ -68,6 +68,7 @@
   (def ^:const id-integer    (int 42))
   (def ^:const id-long       (int 43))
   (def ^:const id-bigint     (int 44))
+  (def ^:const id-biginteger (int 45))
 
   (def ^:const id-float      (int 60))
   (def ^:const id-double     (int 61))
@@ -246,8 +247,8 @@
 
 ;;
 
-(freezer BigInt     id-bigint  (write-biginteger out (.toBigInteger x)))
-(freezer BigInteger id-bigint  (write-biginteger out x))
+(freezer BigInt     id-bigint     (write-biginteger out (.toBigInteger x)))
+(freezer BigInteger id-biginteger (write-biginteger out x))
 
 (freezer Float      id-float   (.writeFloat  out x))
 (freezer Double     id-double  (.writeDouble out x))
@@ -423,7 +424,8 @@
         id-int-as-long   (long (.readInt   in))
         ;; id-compact-long  (read-compact-long in)
 
-        id-bigint  (bigint (read-biginteger in))
+        id-bigint     (bigint (read-biginteger in))
+        id-biginteger (read-biginteger in)
 
         id-float  (.readFloat  in)
         id-double (.readDouble in)