diff --git a/src/ppp/nm-ppp-manager.c b/src/ppp/nm-ppp-manager.c
index 2a8a76f17a..5e893c8579 100644
--- a/src/ppp/nm-ppp-manager.c
+++ b/src/ppp/nm-ppp-manager.c
@@ -809,6 +809,10 @@ create_pppd_cmd_line (NMPPPManager *self,
 
 	g_return_val_if_fail (setting != NULL, NULL);
 
+#ifndef PPPD_PATH
+#define PPPD_PATH NULL
+#endif
+
 	pppd_binary = nm_utils_find_helper ("pppd", PPPD_PATH, err);
 	if (!pppd_binary)
 		return NULL;