diff --git a/hat-trie/test/check_ahtable.c b/hat-trie/test/check_ahtable.c
index 5df6311..f61132b 100644
--- a/hat-trie/test/check_ahtable.c
+++ b/hat-trie/test/check_ahtable.c
@@ -82,7 +82,9 @@ void test_ahtable_insert()
                             *u, v);
         }
     }
-    
+
+    fprintf(stderr, "sizeof: %zu\n", ahtable_sizeof(T));
+
     /* delete some keys */
     for (j = 0; i < k/100; ++j) {
         i = rand() % n;
diff --git a/hat-trie/test/check_hattrie.c b/hat-trie/test/check_hattrie.c
index 151b85a..5bb6b38 100644
--- a/hat-trie/test/check_hattrie.c
+++ b/hat-trie/test/check_hattrie.c
@@ -91,6 +91,8 @@ void test_hattrie_insert()
         }
     }
 
+    fprintf(stderr, "sizeof: %zu\n", hattrie_sizeof(T));
+
     fprintf(stderr, "deleting %zu keys ... \n", d);
     for (j = 0; j < d; ++j) {
         str_map_del(M, ds[j], strlen(ds[j]));