diff --git a/src/mm-iface-modem.c b/src/mm-iface-modem.c
index 7940a2d6..cc5c3361 100644
--- a/src/mm-iface-modem.c
+++ b/src/mm-iface-modem.c
@@ -14,6 +14,8 @@
  * Copyright (c) 2022 Qualcomm Innovation Center, Inc.
  */
 
+#include <config.h>
+
 #include <ModemManager.h>
 #define _LIBMM_INSIDE_MM
 #include <libmm-glib.h>