diff --git a/direct/src/autorestart/CMakeLists.txt b/direct/src/autorestart/CMakeLists.txt
index 8847a518cc..31524487c5 100644
--- a/direct/src/autorestart/CMakeLists.txt
+++ b/direct/src/autorestart/CMakeLists.txt
@@ -1,3 +1,3 @@
-add_definitions(-DWITHIN_PANDA)
 add_executable(autorestart autorestart.c)
+set_target_properties(autorestart PROPERTIES COMPILE_DEFINITIONS WITHIN_PANDA)
 target_link_libraries(autorestart p3dtool)