diff --git a/src/Makefile b/src/Makefile
index 0eecd5500..8a385013b 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -408,7 +408,7 @@ noopt:
 	$(MAKE) OPTIMIZATION="-O0"
 
 valgrind:
-	$(MAKE) OPTIMIZATION="-O0" MALLOC="libc"
+	$(MAKE) OPTIMIZATION="-O0" MALLOC="libc" CFLAGS="-DSANITIZE" CXXFLAGS="-DSANITIZE"
 
 helgrind:
 	$(MAKE) OPTIMIZATION="-O0" MALLOC="libc" CFLAGS="-D__ATOMIC_VAR_FORCE_SYNC_MACROS"