diff --git a/src/viam/sdk/log/private/log_backend.cpp b/src/viam/sdk/log/private/log_backend.cpp
index cde30a506..96e4b3e57 100644
--- a/src/viam/sdk/log/private/log_backend.cpp
+++ b/src/viam/sdk/log/private/log_backend.cpp
@@ -20,15 +20,12 @@ time_pt ptime_convert(const boost::posix_time::ptime& from) {
 }
 
 void LogBackend::consume(const boost::log::record_view& rec) const {
-    std::ostringstream os;
-
-    os << "[" << *rec[attr_file_type{}] << ":" << rec[attr_line_type{}] << "] "
-       << *rec[boost::log::expressions::smessage];
-
     parent->log(*rec[attr_channel_type{}],
                 to_string(*rec[attr_sev_type{}]),
-                os.str(),
-                ptime_convert(*rec[attr_time_type{}]));
+                std::string(*rec[boost::log::expressions::smessage]),
+                ptime_convert(*rec[attr_time_type{}]),
+                std::string(*rec[attr_file_type{}]),
+                *rec[attr_line_type{}]);
 }
 
 boost::shared_ptr<SinkType> LogBackend::create(RobotClient* p) {
diff --git a/src/viam/sdk/robot/client.cpp b/src/viam/sdk/robot/client.cpp
index a1779c9a2..f998fbe93 100644
--- a/src/viam/sdk/robot/client.cpp
+++ b/src/viam/sdk/robot/client.cpp
@@ -309,7 +309,9 @@ std::vector<Name> RobotClient::resource_names() const {
 void RobotClient::log(const std::string& name,
                       const std::string& level,
                       const std::string& message,
-                      time_pt time) {
+                      time_pt time,
+                      const std::string& file,
+                      unsigned int line) {
     if (!impl_) {
         throw std::runtime_error("Tried to send logs to robot when it was not connected");
     }
@@ -322,6 +324,12 @@ void RobotClient::log(const std::string& name,
     log.set_level(level);
     *log.mutable_message() = message;
     *log.mutable_time() = to_proto(time);
+
+    auto& fields = *log.mutable_caller()->mutable_fields();
+    fields["Defined"].set_bool_value(true);
+    fields["File"].set_string_value(file);
+    fields["Line"].set_number_value(line);
+
     req.mutable_logs()->Add(std::move(log));
 
     robot::v1::LogResponse resp;
diff --git a/src/viam/sdk/robot/client.hpp b/src/viam/sdk/robot/client.hpp
index 6e296c3e3..72261ee4a 100644
--- a/src/viam/sdk/robot/client.hpp
+++ b/src/viam/sdk/robot/client.hpp
@@ -174,7 +174,9 @@ class RobotClient {
     void log(const std::string& name,
              const std::string& level,
              const std::string& message,
-             time_pt time);
+             time_pt time,
+             const std::string& file,
+             unsigned int line);
 
     // Makes this RobotClient manage logging by sending logs over grpc to viam-server.
     // This is private and only ever called by ModuleService; in other words it is only called when