diff --git a/plugins/modem-manager/fu-qmi-pdc-updater.c b/plugins/modem-manager/fu-qmi-pdc-updater.c
index b60dcf277..b02a6c92f 100644
--- a/plugins/modem-manager/fu-qmi-pdc-updater.c
+++ b/plugins/modem-manager/fu-qmi-pdc-updater.c
@@ -6,6 +6,8 @@
 
 #include "config.h"
 
+#include <string.h>
+
 #include "fu-qmi-pdc-updater.h"
 
 #define FU_QMI_PDC_MAX_OPEN_ATTEMPTS 8