diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7dbd753..e597a01 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,15 +42,11 @@ option(ENABLE_TESTS "Enable building tests" OFF)
 # Set the debug locks variable for config.h
 if(ENABLE_DEBUG_LOCKS)
     set(CONFIG_ENABLE_DEBUG_LOCKS TRUE)
-else()
-    set(CONFIG_ENABLE_DEBUG_LOCKS FALSE)
 endif()
 
 # Set the world thread variable for config.h
 if(WORLD_USE_BODY_THREAD)
     set(CONFIG_WORLD_USE_BODY_THREAD TRUE)
-else()
-    unset(CONFIG_WORLD_USE_BODY_THREAD)
 endif()
 
 # Set the timeout variable for config.h