diff --git a/libfwupd/fwupd-security-attr.c b/libfwupd/fwupd-security-attr.c
index 4feb65472..ddd3fd28c 100644
--- a/libfwupd/fwupd-security-attr.c
+++ b/libfwupd/fwupd-security-attr.c
@@ -60,6 +60,8 @@ fwupd_security_attr_flag_to_string(FwupdSecurityAttrFlags flag)
 		return "success";
 	if (flag == FWUPD_SECURITY_ATTR_FLAG_OBSOLETED)
 		return "obsoleted";
+	if (flag == FWUPD_SECURITY_ATTR_FLAG_MISSING_DATA)
+		return "missing-data";
 	if (flag == FWUPD_SECURITY_ATTR_FLAG_RUNTIME_UPDATES)
 		return "runtime-updates";
 	if (flag == FWUPD_SECURITY_ATTR_FLAG_RUNTIME_ATTESTATION)
@@ -86,6 +88,8 @@ fwupd_security_attr_flag_from_string(const gchar *flag)
 		return FWUPD_SECURITY_ATTR_FLAG_SUCCESS;
 	if (g_strcmp0(flag, "obsoleted") == 0)
 		return FWUPD_SECURITY_ATTR_FLAG_OBSOLETED;
+	if (g_strcmp0(flag, "missing-data") == 0)
+		return FWUPD_SECURITY_ATTR_FLAG_MISSING_DATA;
 	if (g_strcmp0(flag, "runtime-updates") == 0)
 		return FWUPD_SECURITY_ATTR_FLAG_RUNTIME_UPDATES;
 	if (g_strcmp0(flag, "runtime-attestation") == 0)
diff --git a/libfwupd/fwupd-security-attr.h b/libfwupd/fwupd-security-attr.h
index d24cfe30a..fca61de85 100644
--- a/libfwupd/fwupd-security-attr.h
+++ b/libfwupd/fwupd-security-attr.h
@@ -32,6 +32,7 @@ struct _FwupdSecurityAttrClass {
  * @FWUPD_SECURITY_ATTR_FLAG_NONE:			No flags set
  * @FWUPD_SECURITY_ATTR_FLAG_SUCCESS:			Success
  * @FWUPD_SECURITY_ATTR_FLAG_OBSOLETED:			Obsoleted by another attribute
+ * @FWUPD_SECURITY_ATTR_FLAG_MISSING_DATA:		Missing data
  * @FWUPD_SECURITY_ATTR_FLAG_RUNTIME_UPDATES:		Suffix `U`
  * @FWUPD_SECURITY_ATTR_FLAG_RUNTIME_ATTESTATION:	Suffix `A`
  * @FWUPD_SECURITY_ATTR_FLAG_RUNTIME_ISSUE:		Suffix `!`
@@ -42,6 +43,7 @@ typedef enum {
 	FWUPD_SECURITY_ATTR_FLAG_NONE = 0,
 	FWUPD_SECURITY_ATTR_FLAG_SUCCESS = 1 << 0,
 	FWUPD_SECURITY_ATTR_FLAG_OBSOLETED = 1 << 1,
+	FWUPD_SECURITY_ATTR_FLAG_MISSING_DATA = 1 << 2,
 	FWUPD_SECURITY_ATTR_FLAG_RUNTIME_UPDATES = 1 << 8,
 	FWUPD_SECURITY_ATTR_FLAG_RUNTIME_ATTESTATION = 1 << 9,
 	FWUPD_SECURITY_ATTR_FLAG_RUNTIME_ISSUE = 1 << 10,