diff --git a/tempsdb/chunks/gzip.pyx b/tempsdb/chunks/gzip.pyx
index c76d10bf4288b7e4979986b86707ca0f02d60470..291fca8b9ace2fc1e4d921e65a83cc6943f20df6 100644
--- a/tempsdb/chunks/gzip.pyx
+++ b/tempsdb/chunks/gzip.pyx
@@ -3,7 +3,7 @@ import threading
 
 
 cdef class ReadWriteGzipFile:
-    def __init__(self, str path, int compresslevel = gzip._COMPRESS_LEVEL_FAST):
+    def __init__(self, str path, int compresslevel = 1):
         self.path = path
         self.compress_level = compresslevel
         self.rw_file = gzip.GzipFile(path, 'ab', compresslevel=self.compress_level)