diff --git a/src/shared/password-quality-util-passwdqc.c b/src/shared/password-quality-util-passwdqc.c
index d74e0fb7f2..844068a4d6 100644
--- a/src/shared/password-quality-util-passwdqc.c
+++ b/src/shared/password-quality-util-passwdqc.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include "alloc-util.h"
 #include "dlfcn-util.h"
 #include "errno-util.h"
 #include "log.h"