diff --git a/enzyme/CMakeLists.txt b/enzyme/CMakeLists.txt
index 6033f236a48..2ba42e969ce 100644
--- a/enzyme/CMakeLists.txt
+++ b/enzyme/CMakeLists.txt
@@ -18,7 +18,7 @@ add_definitions(-DENZYME_VERSION_PATCH=${ENZYME_PATCH_VERSION})
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-if (NOT ENZYME_CONFIGURED_WITH_PRESETS)
+if (NOT DEFINED ENZYME_CONFIGURED_WITH_PRESETS)
   set(CMAKE_CXX_FLAGS "-Wall -fno-rtti ${CMAKE_CXX_FLAGS} -Werror=unused-variable -Werror=dangling-else -Werror=unused-but-set-variable -Werror=return-type -Werror=nonnull -Werror=unused-result -Werror=reorder -Werror=switch")
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -ggdb")
   set(CMAKE_CXX_FLAGS_RELEASE "-O2")
diff --git a/enzyme/CMakePresets.json b/enzyme/CMakePresets.json
index 55fdaa121cb..1a5ffa80c5d 100644
--- a/enzyme/CMakePresets.json
+++ b/enzyme/CMakePresets.json
@@ -12,7 +12,7 @@
                 "CMAKE_CXX_STANDARD": "17",
                 "CMAKE_CXX_STANDARD_REQUIRED": "ON",
                 "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
-                "ENZYME_CONFIGURED_WITH_PRESETS": "TRUE"
+                "ENZYME_CONFIGURED_WITH_PRESETS": "ON"
             }
         },
         {