diff --git a/cmake/java.cmake b/cmake/java.cmake
index 447573111f..a866b54b2e 100644
--- a/cmake/java.cmake
+++ b/cmake/java.cmake
@@ -174,6 +174,7 @@ foreach(SUBPROJECT IN ITEMS algorithms graph init linear_solver constraint_solve
   add_subdirectory(ortools/${SUBPROJECT}/java)
   target_link_libraries(jni${JAVA_ARTIFACT} PRIVATE jni${SUBPROJECT})
 endforeach()
+target_link_libraries(jni${JAVA_ARTIFACT} PRIVATE jnimodelbuilder)
 
 #################################
 ##  Java Native Maven Package  ##
diff --git a/ortools/linear_solver/java/modelbuilder.i b/ortools/linear_solver/java/modelbuilder.i
index 7c7ce739e2..d15e08b175 100644
--- a/ortools/linear_solver/java/modelbuilder.i
+++ b/ortools/linear_solver/java/modelbuilder.i
@@ -15,6 +15,7 @@
 
 %include "ortools/base/base.i"
 %include "enums.swg"
+%include "ortools/util/java/vector.i"
 
 %{
 #include "ortools/linear_solver/wrappers/model_builder_helper.h"