diff --git a/lib/curl_sasl.c b/lib/curl_sasl.c
index 1968ccbc7fb0788d6b1d2f4b781778e0bf7de81d..8d7a771745dfb07b54275b1dda6407f870c8135b 100644
--- a/lib/curl_sasl.c
+++ b/lib/curl_sasl.c
@@ -51,7 +51,7 @@
 /* The last #include file should be: */
 #include "memdebug.h"
 
-#ifndef CURL_DISABLE_CRYPTO_AUTH
+#if !defined(CURL_DISABLE_CRYPTO_AUTH) && !defined(USE_WINDOWS_SSPI)
 /* Retrieves the value for a corresponding key from the challenge string
  * returns TRUE if the key could be found, FALSE if it does not exists
  */