diff --git a/src/gc/GCObjectStore.cpp b/src/gc/GCObjectStore.cpp
index f8e8c47..830fdb4 100644
--- a/src/gc/GCObjectStore.cpp
+++ b/src/gc/GCObjectStore.cpp
@@ -794,7 +794,8 @@ namespace xo {
         GCObjectStore::install_type(const AGCObject & meta) noexcept
         {
             scope log(XO_DEBUG(config_.debug_flag_),
-                      xtag("tseq", meta._typeseq()));
+                      xtag("tseq", meta._typeseq()),
+                      xtag("tname", TypeRegistry::id2name(meta._typeseq())));
 
             typeseq tseq = meta._typeseq();
 
diff --git a/utest/MutationLogStore.test.cpp b/utest/MutationLogStore.test.cpp
index 3546ba4..40e5f25 100644
--- a/utest/MutationLogStore.test.cpp
+++ b/utest/MutationLogStore.test.cpp
@@ -286,7 +286,8 @@ namespace ut {
 
             {Cmd::assign_root, 2, 0}, //      [2] = [0] = 99
 
-            // o.g. [2] now garbage
+            // phase 3 gc (4th gc)
+            // o.g. o.g. [2] would be garbage, if we collected g1
 
             // ----- phase 4 -----