diff --git a/crypto/cts.c b/crypto/cts.c
index c4e70bf..ccf9c5d 100644
--- a/crypto/cts.c
+++ b/crypto/cts.c
@@ -89,6 +89,9 @@
 	if (lastn < 0)
 		return -EINVAL;
 
+	sg_init_table(sgsrc, 1);
+	sg_init_table(sgdst, 1);
+
 	memset(s, 0, sizeof(s));
 	scatterwalk_map_and_copy(s, src, offset, nbytes, 0);
 
@@ -172,6 +175,9 @@
 	if (lastn < 0)
 		return -EINVAL;
 
+	sg_init_table(sgsrc, 1);
+	sg_init_table(sgdst, 1);
+
 	scatterwalk_map_and_copy(s, src, offset, nbytes, 0);
 
 	lcldesc.tfm = ctx->child;