diff --git a/include/result.h b/include/result.h
index a4beda8..5cce857 100644
--- a/include/result.h
+++ b/include/result.h
@@ -13,7 +13,9 @@ enum libab_result_e {
     LIBAB_UNKNOWN_TYPE,
     LIBAB_BAD_TYPE,
     LIBAB_EOF,
-    LIBAB_UNEXPECTED
+    LIBAB_UNEXPECTED,
+    LIBAB_AMBIGOUS_TYPE,
+    LIBAB_MISMATCHED_TYPE
 };
 
 typedef enum libab_result_e libab_result;
diff --git a/src/util.c b/src/util.c
index 4aa6a56..9a665d0 100644
--- a/src/util.c
+++ b/src/util.c
@@ -65,7 +65,7 @@ libab_result libab_resolve_parsetype(libab_parsetype* to_resolve,
             to_resolve->data_u.base = basetype;
             to_resolve->variant |= LIBABACUS_TYPE_F_RESOLVED;
         } else {
-            result = LIBAB_BAD_TYPE;
+            result = LIBAB_UNKNOWN_TYPE;
         }
     }