diff --git a/CMakeLists.txt b/CMakeLists.txt
index b872eca8c4bc85037ae1733f1f501869f459dffd..3d7ee055a7d385aae5ee1a03f8022831aee03a6e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,8 +36,10 @@ if (${KF5Config_VERSION} STRGREATER "5.56.0")
         add_definitions(-DQT_NO_FOREACH)
         MESSAGE(STATUS "compile without foreach")
 endif()
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
-add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x060000)
+if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+   add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x060000)
+   add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x060000)
+endif()
 add_subdirectory(pics)
 add_subdirectory(themes)
 if (KF5DocTools_FOUND)