diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 93ffad034..c049ef9d2 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -190,6 +190,9 @@
 #  ifndef CURL_DISABLE_GOPHER
 #    define CURL_DISABLE_GOPHER
 #  endif
+#  ifndef CURL_DISABLE_SMB
+#    define CURL_DISABLE_SMB
+#  endif
 #endif
 
 /*