diff --git a/buckets/deflate_buckets.c b/buckets/deflate_buckets.c
index f320901..59d4050 100644
--- a/buckets/deflate_buckets.c
+++ b/buckets/deflate_buckets.c
@@ -503,7 +503,7 @@
               break;
             }
         case STATE_COMPRESS_INIT:
-            zRC = deflateInit2(&ctx->zstream, Z_DEFAULT_STRATEGY, Z_DEFLATED,
+            zRC = deflateInit2(&ctx->zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
                                ctx->windowSize, ctx->memLevel, Z_DEFAULT_STRATEGY);
             if (zRC != Z_OK) {
                 serf__log(LOGLVL_ERROR, LOGCOMP_COMPR, __FILE__, ctx->config,