diff --git a/src/datatype.c b/src/datatype.c
index f347010f4a1a..2d39239316a6 100644
--- a/src/datatype.c
+++ b/src/datatype.c
@@ -1581,7 +1581,7 @@ const struct datatype boolean_type = {
 	.type		= TYPE_BOOLEAN,
 	.name		= "boolean",
 	.desc		= "boolean type",
-	.size		= 1,
+	.size		= BITS_PER_BYTE,
 	.parse		= boolean_type_parse,
 	.basetype	= &integer_type,
 	.sym_tbl	= &boolean_tbl,