diff --git a/lib/curl_hmac.h b/lib/curl_hmac.h
index f54edeb49e..9675c6c542 100644
--- a/lib/curl_hmac.h
+++ b/lib/curl_hmac.h
@@ -26,7 +26,7 @@
 
 #if (defined(USE_CURL_NTLM_CORE) && !defined(USE_WINDOWS_SSPI)) ||      \
   !defined(CURL_DISABLE_AWS) || !defined(CURL_DISABLE_DIGEST_AUTH) ||   \
-  defined(USE_SSL)
+  defined(USE_LIBSSH2) || defined(USE_SSL)
 
 #include <curl/curl.h>