1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c
index bc8868c36a..ab1f7388a7 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3738,7 +3738,7 @@ static ssize_t qcow2_compress(void *dest, const void *src, size_t size)
     memset(&strm, 0, sizeof(strm));
     ret = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
                        -12, 9, Z_DEFAULT_STRATEGY);
-    if (ret != 0) {
+    if (ret != Z_OK) {
         return -2;
     }