diff --git a/libfwupdplugin/fu-efi-signature-list.c b/libfwupdplugin/fu-efi-signature-list.c
index ad5698deb..87df84662 100644
--- a/libfwupdplugin/fu-efi-signature-list.c
+++ b/libfwupdplugin/fu-efi-signature-list.c
@@ -7,6 +7,7 @@
 #include "config.h"
 
 #include <fwupd.h>
+#include <string.h>
 
 #include "fu-common.h"
 #include "fu-efi-signature-private.h"