diff --git a/ChangeLog b/ChangeLog
index d19adb1fc5..97a0ff5142 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Dec 19 14:28:01 2015  Jake Worth  <jakeworth82@gmail.com>
+
+	* ext/zlib/zlib.c (Init_zlib): [DOC] Fix double-word typo and
+	  grammatical error.  [Fix GH-1162]
+
 Sat Dec 19 14:23:59 2015  Jake Worth  <jakeworth82@gmail.com>
 
 	* lib/csv.rb (CSV#initialize): [DOC] Fix double-word typo.
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index db7032d2b2..25b3e7afab 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -4360,7 +4360,7 @@ Init_zlib(void)
      * pre-compressed data to a deflate stream.
      */
     rb_define_const(mZlib, "NO_COMPRESSION", INT2FIX(Z_NO_COMPRESSION));
-    /* Fastest compression level, but with with lowest space savings. */
+    /* Fastest compression level, but with the lowest space savings. */
     rb_define_const(mZlib, "BEST_SPEED", INT2FIX(Z_BEST_SPEED));
     /* Slowest compression level, but with the best space savings. */
     rb_define_const(mZlib, "BEST_COMPRESSION", INT2FIX(Z_BEST_COMPRESSION));