diff --git a/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c b/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c
index f6fab60c..a49fe63f 100644
--- a/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c
+++ b/src/libsodium/crypto_stream/chacha20/ref/stream_chacha20_ref.c
@@ -303,7 +303,6 @@ stream_ref_xor_ic(unsigned char *c, const unsigned char *m,
     chacha_encrypt_bytes(&ctx, m, c, mlen);
 
     sodium_memzero(&ctx, sizeof ctx);
-    sodium_memzero(ic_bytes, sizeof ic_bytes);
 
     return 0;
 }
@@ -325,7 +324,6 @@ stream_ietf_ref_xor_ic(unsigned char *c, const unsigned char *m,
     chacha_ietf_ivsetup(&ctx, n, ic_bytes);
     chacha_encrypt_bytes(&ctx, m, c, mlen);
     sodium_memzero(&ctx, sizeof ctx);
-    sodium_memzero(ic_bytes, sizeof ic_bytes);
 
     return 0;
 }