diff --git a/cmake/ProtobufMutator.cmake b/cmake/ProtobufMutator.cmake
index da0a4a2fe955c6d0b224a31d7e20248af3fa86d5..83c1a51f702fec74baede9052bc459a0be9f213e 100644
--- a/cmake/ProtobufMutator.cmake
+++ b/cmake/ProtobufMutator.cmake
@@ -71,7 +71,7 @@ ExternalProject_Add(${LPM_TARGET}
   CONFIGURE_COMMAND ${CMAKE_COMMAND} ${LPM_INSTALL_DIR}/src/${LPM_TARGET}
         -G${CMAKE_GENERATOR}
         -DCMAKE_INSTALL_PREFIX=${LPM_INSTALL_DIR}
-        -DCMAKE_BUILD_TYPE=Debug
+        -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
         -DCMAKE_POSITION_INDEPENDENT_CODE=ON
         -DCMAKE_C_COMPILER:FILEPATH=${CMAKE_C_COMPILER}
         -DCMAKE_CXX_COMPILER:FILEPATH=${CMAKE_CXX_COMPILER}