diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c3b5edd..186a710d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ set(BUILD_SHARED_LIBS OFF)
 option(gmock_build_tests "Build all of Google Mock's own tests." OFF)
 
 # A directory to find Google Test sources.
-if (EXISTS gtest/CMakeLists.txt)
+if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt")
   set(gtest_dir gtest)
 else()
   set(gtest_dir ../gtest)