diff --git a/src/obitypes.c b/src/obitypes.c
index 3a3e04b..15d1c62 100644
--- a/src/obitypes.c
+++ b/src/obitypes.c
@@ -40,8 +40,12 @@ size_t obi_sizeof(OBIType_t type)
 	case OBI_CHAR:  size = sizeof(obichar_t);
 					break;
 
-	case OBI_STR:   // fallthrough
-	case OBI_SEQ:   // fallthrough
+	case OBI_STR:	size = sizeof(index_t);
+					break;
+
+	case OBI_SEQ:	size = sizeof(index_t);
+					break;
+
 	case OBI_IDX:	size = sizeof(index_t);
 					break;