diff --git a/CMakeLists.txt b/CMakeLists.txt
index c578ec3a77..f14f62f6b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,6 +250,12 @@ if(CMake_RUN_CLANG_TIDY)
     message(FATAL_ERROR "CMake_RUN_CLANG_TIDY is ON but clang-tidy is not found!")
   endif()
   set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_COMMAND}")
+
+  # provide definitions for targets that require a rebuild once .clang-tidy changes
+  file(SHA1 ${CMAKE_CURRENT_SOURCE_DIR}/.clang-tidy clang_tidy_sha1)
+  set(CLANG_TIDY_DEFINITIONS "CLANG_TIDY_SHA1=${clang_tidy_sha1}")
+  unset(clang_tidy_sha1)
+
 endif()
 configure_file(.clang-tidy .clang-tidy COPYONLY)
 
diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index fdc64762fe..a4dd918602 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -779,6 +779,8 @@ if(WIN32 AND NOT UNIX)
   target_link_libraries(CMakeLib rpcrt4 crypt32)
 endif()
 
+target_compile_definitions(CMakeLib PUBLIC ${CLANG_TIDY_DEFINITIONS})
+
 #
 # CTestLib
 #