diff --git a/lib/setup.h b/lib/setup.h
index 8f19dde3f2..2fcc29cd84 100644
--- a/lib/setup.h
+++ b/lib/setup.h
@@ -24,6 +24,7 @@
  ***************************************************************************/
 
 #ifdef HTTP_ONLY
+#define CURL_DISABLE_TFTP
 #define CURL_DISABLE_FTP
 #define CURL_DISABLE_LDAP
 #define CURL_DISABLE_TELNET