diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
index d3e4a9fe..08d99d18 100644
--- a/third_party/CMakeLists.txt
+++ b/third_party/CMakeLists.txt
@@ -13,6 +13,11 @@ find_package(GTest QUIET CONFIG)
 if(NOT ${GTEST_FOUND})
   message(STATUS "Using bundled GoogleTest library.")
   add_subdirectory(googletest)
+  FetchContent_SetPopulated(
+          GTest
+          SOURCE_DIR googletest
+          BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/googletest
+  )
 endif()
 
 add_subdirectory(protobuf-matchers)