diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 01c0d4a..dd4dcab 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -512,6 +512,7 @@
 	strncpy(rblkcipher.type, "blkcipher", sizeof(rblkcipher.type));
 	strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>",
 		sizeof(rblkcipher.geniv));
+	rblkcipher.geniv[sizeof(rblkcipher.geniv) - 1] = '\0';
 
 	rblkcipher.blocksize = alg->cra_blocksize;
 	rblkcipher.min_keysize = alg->cra_blkcipher.min_keysize;