diff --git a/extensions/xt_quota2.c b/extensions/xt_quota2.c
index ba1dc10..5f75342 100644
--- a/extensions/xt_quota2.c
+++ b/extensions/xt_quota2.c
@@ -29,7 +29,7 @@ struct xt_quota_counter {
 	spinlock_t lock;
 	struct list_head list;
 	atomic_t ref;
-	char name[XT_QUOTA_COUNTER_NAME_LENGTH];
+	char name[sizeof(((struct xt_quota_mtinfo2 *)NULL)->name)];
 	struct proc_dir_entry *procfs_entry;
 };
 
diff --git a/extensions/xt_quota2.h b/extensions/xt_quota2.h
index 3c326df..fdb6db3 100644
--- a/extensions/xt_quota2.h
+++ b/extensions/xt_quota2.h
@@ -6,14 +6,12 @@ enum xt_quota_flags {
 	XT_QUOTA_GROW   = 1 << 1,
 	XT_QUOTA_PACKET = 1 << 2,
 	XT_QUOTA_MASK   = 0x7,
-
-	XT_QUOTA_COUNTER_NAME_LENGTH = 31,
 };
 
 struct xt_quota_counter;
 
 struct xt_quota_mtinfo2 {
-	char name[XT_QUOTA_COUNTER_NAME_LENGTH];
+	char name[31];
 	u_int8_t flags;
 
 	/* Comparison-invariant */