diff --git a/tests/libsubid/04_nss/libsubid_zzz.c b/tests/libsubid/04_nss/libsubid_zzz.c
index 89200879..cf92ff3c 100644
--- a/tests/libsubid/04_nss/libsubid_zzz.c
+++ b/tests/libsubid/04_nss/libsubid_zzz.c
@@ -4,6 +4,7 @@
 #include <stdbool.h>
 #include <subid.h>
 #include <string.h>
+#include "alloc.h"
 
 enum subid_status shadow_subid_has_any_range(const char *owner, enum subid_type t, bool *result)
 {