diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index dee94d9ecfba5e3724d37ebc844bd1219aba587d..132953e144d34bcb0766f4eebfce32107c7a489b 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -8349,7 +8349,7 @@ struct comp_testvec {
 
 /*
  * Deflate test vectors (null-terminated strings).
- * Params: winbits=11, Z_DEFAULT_COMPRESSION, MAX_MEM_LEVEL.
+ * Params: winbits=-11, Z_DEFAULT_COMPRESSION, MAX_MEM_LEVEL.
  */
 #define DEFLATE_COMP_TEST_VECTORS 2
 #define DEFLATE_DECOMP_TEST_VECTORS 2