diff --git a/imperative/src/impl/profiler.cpp b/imperative/src/impl/profiler.cpp
index 681cccbe..ccb98081 100644
--- a/imperative/src/impl/profiler.cpp
+++ b/imperative/src/impl/profiler.cpp
@@ -83,7 +83,8 @@ size_t TensorRecorder::record_tensor(const TensorPtr& tensor) {
         return id;
     } else {
         auto id = m_next_id++;
-        m_tensor_map.insert({tensor.get(), {std::weak_ptr{tensor}, id}});
+        m_tensor_map.insert(
+                {tensor.get(), {std::weak_ptr<Tensor>{tensor}, id}});
         return id;
     }
 }
diff --git a/imperative/src/include/megbrain/imperative/profiler.h b/imperative/src/include/megbrain/imperative/profiler.h
index d1cd37de..b2452242 100644
--- a/imperative/src/include/megbrain/imperative/profiler.h
+++ b/imperative/src/include/megbrain/imperative/profiler.h
@@ -40,8 +40,8 @@ struct ProfileEntry {
     std::vector<std::tuple<CompNode, TimeClosure, TimeClosure>> device_list;
     std::vector<ProfileTensor> inputs;
     std::vector<ProfileTensor> outputs;
-    ssize_t memory = 0;
-    ssize_t computation = 0;
+    long long memory = 0;
+    long long computation = 0;
 #if MGB_ENABLE_JSON
     std::shared_ptr<json::Value> param;
 #endif