diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 4b751b21f4..1d20e144c6 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -73,26 +73,6 @@
 #define SCH_DEV(x) do { } while(0)
 #endif
 
-#ifndef BCRYPT_CHAIN_MODE_CCM
-#define BCRYPT_CHAIN_MODE_CCM L"ChainingModeCCM"
-#endif
-
-#ifndef BCRYPT_CHAIN_MODE_GCM
-#define BCRYPT_CHAIN_MODE_GCM L"ChainingModeGCM"
-#endif
-
-#ifndef BCRYPT_AES_ALGORITHM
-#define BCRYPT_AES_ALGORITHM L"AES"
-#endif
-
-#ifndef BCRYPT_SHA256_ALGORITHM
-#define BCRYPT_SHA256_ALGORITHM L"SHA256"
-#endif
-
-#ifndef BCRYPT_SHA384_ALGORITHM
-#define BCRYPT_SHA384_ALGORITHM L"SHA384"
-#endif
-
 #ifdef HAS_CLIENT_CERT_PATH
 #ifdef UNICODE
 #define CURL_CERT_STORE_PROV_SYSTEM CERT_STORE_PROV_SYSTEM_W