diff --git a/include/sys/ddt.h b/include/sys/ddt.h
index 0d7c4f927..4fba49c75 100644
--- a/include/sys/ddt.h
+++ b/include/sys/ddt.h
@@ -179,7 +179,7 @@ typedef struct ddt_ops {
 	int (*ddt_op_count)(objset_t *os, uint64_t object, uint64_t *count);
 } ddt_ops_t;
 
-#define	DDT_NAMELEN	80
+#define	DDT_NAMELEN	102
 
 extern void ddt_object_name(ddt_t *ddt, enum ddt_type type,
     enum ddt_class clazz, char *name);