diff --git a/src/bio.c b/src/bio.c
index 3b76b5ec1e..38484309dd 100644
--- a/src/bio.c
+++ b/src/bio.c
@@ -608,7 +608,7 @@ static int wolfSSL_BIO_MEMORY_write(WOLFSSL_BIO* bio, const void* data,
     if (len == 0)
         return WOLFSSL_SUCCESS; /* Return early to make logic simpler */
 
-    if (wolfSSL_BUF_MEM_grow_ex(bio->mem_buf, (size_t)(bio->wrSz + len), 0)
+    if (wolfSSL_BUF_MEM_grow_ex(bio->mem_buf, bio->wrSz + len, 0)
             == 0) {
         WOLFSSL_MSG("Error growing memory area");
         return WOLFSSL_FAILURE;
@@ -1320,7 +1320,7 @@ size_t wolfSSL_BIO_ctrl_pending(WOLFSSL_BIO *bio)
         if (pair->wrIdx > 0 && pair->wrIdx <= pair->rdIdx) {
             /* in wrap around state where beginning of buffer is being
              * overwritten */
-            return (size_t)(pair->wrSz - pair->rdIdx + pair->wrIdx);
+            return pair->wrSz - pair->rdIdx + pair->wrIdx;
         }
         else {
             /* simple case where has not wrapped around */