diff --git a/src/include/common/blkreftable.h b/src/include/common/blkreftable.h
index 70d6c072d7..316e67122c 100644
--- a/src/include/common/blkreftable.h
+++ b/src/include/common/blkreftable.h
@@ -29,10 +29,7 @@
 /* Magic number for serialization file format. */
 #define BLOCKREFTABLE_MAGIC			0x652b137b
 
-struct BlockRefTable;
-struct BlockRefTableEntry;
-struct BlockRefTableReader;
-struct BlockRefTableWriter;
+/* Struct definitions appear in blkreftable.c */
 typedef struct BlockRefTable BlockRefTable;
 typedef struct BlockRefTableEntry BlockRefTableEntry;
 typedef struct BlockRefTableReader BlockRefTableReader;