diff --git a/ChangeLog b/ChangeLog
index f5e440f4548bdb45c737fc5bf2b186bfe305261d..9632977bb8a9834fe07a0b1298954de389220c85 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2014-02-06  Niels Möller  <nisse@lysator.liu.se>
+
+	* examples/nettle-benchmark.c (time_cipher): Fixed memset calls.
+
 2014-01-30  Niels Möller  <nisse@lysator.liu.se>
 
 	* Makefile.in (nettle_SOURCES): Arrange in alphabetic order.
diff --git a/examples/nettle-benchmark.c b/examples/nettle-benchmark.c
index 7e15a18e76ead2b3748a6a19c88559f29a799280..d66ce71ec1a34e8c99908822c902fb29971a4590 100644
--- a/examples/nettle-benchmark.c
+++ b/examples/nettle-benchmark.c
@@ -553,7 +553,7 @@ time_cipher(const struct nettle_cipher *cipher)
 	info.block_size = cipher->block_size;
 	info.iv = iv;
     
-        memset(iv, 0, sizeof(iv));
+        memset(iv, 0, sizeof(cipher->block_size));
     
         cipher->set_encrypt_key(ctx, key);
 
@@ -569,7 +569,7 @@ time_cipher(const struct nettle_cipher *cipher)
 	info.block_size = cipher->block_size;
 	info.iv = iv;
     
-        memset(iv, 0, sizeof(iv));
+        memset(iv, 0, sizeof(cipher->block_size));
 
         cipher->set_decrypt_key(ctx, key);
 
@@ -586,7 +586,7 @@ time_cipher(const struct nettle_cipher *cipher)
 	info.block_size = cipher->block_size;
 	info.iv = iv;
     
-        memset(iv, 0, sizeof(iv));
+        memset(iv, 0, sizeof(cipher->block_size));
     
         cipher->set_encrypt_key(ctx, key);