diff --git a/lib/curl_hmac.h b/lib/curl_hmac.h
index 2ea03dd268..7a5387a948 100644
--- a/lib/curl_hmac.h
+++ b/lib/curl_hmac.h
@@ -25,7 +25,8 @@
  ***************************************************************************/
 
 #if (defined(USE_CURL_NTLM_CORE) && !defined(USE_WINDOWS_SSPI))         \
-  || !defined(CURL_DISABLE_AWS) || !defined(CURL_DISABLE_DIGEST_AUTH)
+  || !defined(CURL_DISABLE_AWS) || !defined(CURL_DISABLE_DIGEST_AUTH)   \
+  || defined(USE_LIBSSH2)
 
 #include <curl/curl.h>