diff --git a/include/sys/dsl_dataset.h b/include/sys/dsl_dataset.h
index eb0c6838b9..a0ef3bc9ca 100644
--- a/include/sys/dsl_dataset.h
+++ b/include/sys/dsl_dataset.h
@@ -84,13 +84,6 @@ struct dsl_pool;
  */
 #define	DS_FIELD_BOOKMARK_NAMES "com.delphix:bookmarks"
 
-/*
- * This field is present (with value=0) if this dataset may contain large
- * blocks (>128KB).  If it is present, then this dataset
- * is counted in the refcount of the SPA_FEATURE_LARGE_BLOCKS feature.
- */
-#define	DS_FIELD_LARGE_BLOCKS "org.open-zfs:large_blocks"
-
 /*
  * This field is present (with value=0) if this dataset may contain large
  * dnodes (>512B).  If it is present, then this dataset is counted in the