diff --git a/racket/src/rktio/rktio_sha1.c b/racket/src/rktio/rktio_sha1.c
index 0c5139d9a4..c6c798d58c 100644
--- a/racket/src/rktio/rktio_sha1.c
+++ b/racket/src/rktio/rktio_sha1.c
@@ -184,9 +184,6 @@ SHA1_Transform(uint32_sha1_t state[5], const uint8_sha1_t buffer[64])
     state[2] += c;
     state[3] += d;
     state[4] += e;
-
-    /* Wipe variables */
-    a = b = c = d = e = 0;
 }
 
 /* SHA1Init - Initialize new context */
@@ -254,7 +251,6 @@ SHA1_Final(SHA1_CTX *context, uint8_sha1_t digest[RKTIO_SHA1_DIGEST_SIZE])
     }
 
     /* Wipe variables */
-    i = 0;
     memset(context->buffer, 0, 64);
     memset(context->state, 0, 20);
     memset(context->count, 0, 8);