diff --git a/cartographer/mapping_3d/proto/hybrid_grid.proto b/cartographer/mapping_3d/proto/hybrid_grid.proto
index 8caf1e8..feb968d 100644
--- a/cartographer/mapping_3d/proto/hybrid_grid.proto
+++ b/cartographer/mapping_3d/proto/hybrid_grid.proto
@@ -19,10 +19,10 @@ package cartographer.mapping_3d.proto;
 message HybridGrid {
   float resolution = 1;
   // '{x, y, z}_indices[i]' is the index of 'values[i]'.
-  repeated sint32 x_indices = 3 [packed = true];
-  repeated sint32 y_indices = 4 [packed = true];
-  repeated sint32 z_indices = 5 [packed = true];
+  repeated sint32 x_indices = 3;
+  repeated sint32 y_indices = 4;
+  repeated sint32 z_indices = 5;
   // The entries in 'values' should be uint16s, not int32s, but protos don't
   // have a uint16 type.
-  repeated int32 values = 6 [packed = true];
+  repeated int32 values = 6;
 }
diff --git a/cartographer/sensor/proto/sensor.proto b/cartographer/sensor/proto/sensor.proto
index bd55ad6..fac666a 100644
--- a/cartographer/sensor/proto/sensor.proto
+++ b/cartographer/sensor/proto/sensor.proto
@@ -23,7 +23,7 @@ import "cartographer/transform/proto/transform.proto";
 // Compressed collection of a 3D point cloud.
 message CompressedPointCloud {
   int32 num_points = 1;
-  repeated int32 point_data = 3 [packed = true];
+  repeated int32 point_data = 3;
 }
 
 // Proto representation of ::cartographer::sensor::ImuData.