diff --git a/src/Makefile b/src/Makefile
index 7ccfc6c..00bec68 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -12,9 +12,11 @@ ifdef release
 	release = 1
 endif
 
+ALLOCATOR_MAGIC = $(shell doas hwclock | sha512sum | head -c 128 | md5sum | head -c 8)
+
 SUBOBJS = kernel/kernel.o libk/libk.o rust.o
 
-DEFINES = ARCH="${ARCH}" ASM="${ASM}" ASMFLAGS="${ASMFLAGS}" SOURCE="${SOURCE}" PWD="${PWD}"
+DEFINES = ARCH="${ARCH}" ASM="${ASM}" ASMFLAGS="${ASMFLAGS}" SOURCE="${SOURCE}" PWD="${PWD}" ALLOCATOR_MAGIC="${ALLOCATOR_MAGIC}"
 ifdef release
 	DEFINES := ${DEFINES} release=1
 endif
diff --git a/src/kernel/Makefile b/src/kernel/Makefile
index f47b005..e4ab8de 100644
--- a/src/kernel/Makefile
+++ b/src/kernel/Makefile
@@ -6,7 +6,8 @@
 CC = gcc
 CCFLAGS = -m64 -mcmodel=large -I ../../include \
 			-fno-stack-protector -fno-exceptions \
-			-fno-builtin -nostdinc -nostdlib
+			-fno-builtin -nostdinc -nostdlib \
+			-DMEMM_ALLOCATOR_MAGIC=\"${ALLOCATOR_MAGIC}\"
 ifdef release
 	CCFLAGS := ${CCFLAGS} -O2
 endif