diff --git a/scst/include/scst.h b/scst/include/scst.h
index 3ffa3f0a0..9f5248dae 100644
--- a/scst/include/scst.h
+++ b/scst/include/scst.h
@@ -4971,7 +4971,7 @@ static inline struct scatterlist *sg_next_inline(struct scatterlist *sg)
 static inline void sg_clear(struct scatterlist *sg)
 {
 	memset(sg, 0, sizeof(*sg));
-#if 0 // def CONFIG_DEBUG_SG
+#ifdef CONFIG_DEBUG_SG
 	sg->sg_magic = SG_MAGIC;
 #endif
 }