diff --git a/drivers/atmodem/call-barring.c b/drivers/atmodem/call-barring.c
index 27fcbaf9..935fb465 100644
--- a/drivers/atmodem/call-barring.c
+++ b/drivers/atmodem/call-barring.c
@@ -19,6 +19,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #define _GNU_SOURCE
 #include <string.h>
 #include <stdlib.h>