--- libmalloc/libmalloc-374.60.3/xcodeconfig/libmalloc.xcconfig
+++ libmalloc/libmalloc-409.40.6/xcodeconfig/libmalloc.xcconfig
@@ -24,9 +24,11 @@
 SYSTEM_HEADER_SEARCH_PATHS = $(SYSTEM_FRAMEWORK_HEADERS) $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/usr/local/include $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/usr/include
 SYSTEM_FRAMEWORK_SEARCH_PATHS = $(SDKROOT)/$(SDK_INSTALL_HEADERS_ROOT)/System/Library/Frameworks
 
-GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_PREPROCESSOR_DEFINITIONS) $(PLATFORM_PREPROCESSOR_DEFINITIONS)
+GCC_PREPROCESSOR_DEFINITIONS = _FORTIFY_SOURCE=0 NDEBUG $(OSATOMIC_PREPROCESSOR_DEFINITIONS) $(PLATFORM_PREPROCESSOR_DEFINITIONS) $(DRIVERKIT_PREPROCESSOR_DEFINITIONS)
 OSATOMIC_PREPROCESSOR_DEFINITIONS = OSATOMIC_USE_INLINED=1 OS_UNFAIR_LOCK_INLINE=1
 OSATOMIC_PREPROCESSOR_DEFINITIONS_NOINLINE = OSATOMIC_DEPRECATED=0 OSATOMIC_USE_INLINED=0 OS_UNFAIR_LOCK_INLINE=0
+DRIVERKIT_PREPROCESSOR_DEFINITIONS = MALLOC_TARGET_DK_OSX=0
+DRIVERKIT_PREPROCESSOR_DEFINITIONS[sdk=driverkit.macosx*] = MALLOC_TARGET_DK_OSX=1
 
 GCC_NO_COMMON_BLOCKS = YES
 ENABLE_STRICT_OBJC_MSGSEND = YES