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-rw-r--r--erts/doc/src/zlib.xml6
-rw-r--r--erts/preloaded/src/zlib.erl6
2 files changed, 6 insertions, 6 deletions
diff --git a/erts/doc/src/zlib.xml b/erts/doc/src/zlib.xml
index 673b743e2e..1f10ddef6d 100644
--- a/erts/doc/src/zlib.xml
+++ b/erts/doc/src/zlib.xml
@@ -99,7 +99,7 @@ list_to_binary([Compressed|Last])</pre>
<datatype>
<name name="zwindowbits"/>
<desc>
- <p>Normally in the range <c>-15..-9 | 9..15</c>.</p>
+ <p>Normally in the range <c>-15..-8 | 8..15</c>.</p>
</desc>
</datatype>
</datatypes>
@@ -149,7 +149,7 @@ list_to_binary([Compressed|Last])</pre>
currently the only supported method is <c>deflated</c>.</p>
<p>The <c><anno>WindowBits</anno></c> parameter is the base two logarithm
of the window size (the size of the history buffer). It
- should be in the range 9 through 15. Larger values
+ should be in the range 8 through 15. Larger values
of this parameter result in better compression at the
expense of memory usage. The default value is 15 if
<c>deflateInit/2</c>. A negative <c><anno>WindowBits</anno></c>
@@ -288,7 +288,7 @@ list_to_binary([B1,B2])</pre>
<p>Initialize decompression session on zlib stream.</p>
<p>The <c><anno>WindowBits</anno></c> parameter is the base two logarithm
of the maximum window size (the size of the history buffer).
- It should be in the range 9 through 15.
+ It should be in the range 8 through 15.
The default value is 15 if <c>inflateInit/1</c> is used.
If a compressed stream with a larger window size is
given as input, inflate() will throw the <c>data_error</c>
diff --git a/erts/preloaded/src/zlib.erl b/erts/preloaded/src/zlib.erl
index 5ebc67dcaa..61dc642536 100644
--- a/erts/preloaded/src/zlib.erl
+++ b/erts/preloaded/src/zlib.erl
@@ -126,7 +126,7 @@
-type zlevel() :: 'none' | 'default' | 'best_compression' | 'best_speed'
| 0..9.
-type zmethod() :: 'deflated'.
--type zwindowbits() :: -15..-9 | 9..47.
+-type zwindowbits() :: -15..-8 | 8..47.
-type zmemlevel() :: 1..9.
-type zstrategy() :: 'default' | 'filtered' | 'huffman_only' | 'rle'.
@@ -531,8 +531,8 @@ arg_method(_) -> erlang:error(badarg).
-spec arg_bitsz(zwindowbits()) -> zwindowbits().
arg_bitsz(Bits) when is_integer(Bits) andalso
- ((8 < Bits andalso Bits < 48) orelse
- (-15 =< Bits andalso Bits < -8)) ->
+ ((8 =< Bits andalso Bits < 48) orelse
+ (-15 =< Bits andalso Bits =< -8)) ->
Bits;
arg_bitsz(_) -> erlang:error(badarg).