diff --git a/wpimath/src/main/native/include/frc/proto/VectorProto.h b/wpimath/src/main/native/include/frc/proto/VectorProto.h
index b3d14d3bbc8..190950e4304 100644
--- a/wpimath/src/main/native/include/frc/proto/VectorProto.h
+++ b/wpimath/src/main/native/include/frc/proto/VectorProto.h
@@ -10,7 +10,7 @@
 #include "frc/EigenCore.h"
 
 template <int Size>
-struct WPILIB_DLLEXPORT wpi::Protobuf<frc::Vectord<Size>> {
+struct WPILIB_DLLEXPORT wpi::Protobuf<frc::Matrixd<Size, 1>> {
   static google::protobuf::Message* New(google::protobuf::Arena* arena);
   static frc::Vectord<Size> Unpack(const google::protobuf::Message& msg);
   static void Pack(google::protobuf::Message* msg,