diff --git a/Makefile b/Makefile
index 1fa7ab9..724c152 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,17 @@
 # SPDX-License-Identifier: GPL-2.0
 #
 # Define V=1 for more verbose compile.
+# Define S=1 for sanitation checks.
 
 CFLAGS += -Wall -Iinclude
 
 TOOL_CFLAGS += -O2 -g $(CFLAGS) $(BASIC_CFLAGS)
 
+ifeq "$(S)" "1"
+TOOL_CFLAGS += -fsanitize=address -fsanitize=leak -fsanitize=undefined	\
+	  -fsanitize-address-use-after-scope -fstack-check
+endif
+
 MODULE_LD := script/iop.ld
 # FIXME: -O0 -> -O2
 IOP_CFLAGS += -O0 -march=r3000 -EL -msoft-float -fomit-frame-pointer	\