diff --git a/cc/sanitize.go b/cc/sanitize.go
index f8661a6..3cf8b58 100644
--- a/cc/sanitize.go
+++ b/cc/sanitize.go
@@ -76,7 +76,7 @@
 	minimalRuntimeFlags = []string{"-fsanitize-minimal-runtime", "-fno-sanitize-trap=integer,undefined",
 		"-fno-sanitize-recover=integer,undefined"}
 	hwasanGlobalOptions = []string{"heap_history_size=1023", "stack_history_size=512",
-		"export_memory_stats=0", "max_malloc_fill_size=0"}
+		"export_memory_stats=0", "max_malloc_fill_size=4096", "malloc_fill_byte=0"}
 )
 
 type SanitizerType int