diff --git a/wolfcrypt/src/hmac.c b/wolfcrypt/src/hmac.c
index 912b26dc1..c6a214edb 100644
--- a/wolfcrypt/src/hmac.c
+++ b/wolfcrypt/src/hmac.c
@@ -1581,7 +1581,7 @@ int wolfSSL_GetHmacMaxSize(void)
             left = min(left, hashSz);
             XMEMCPY(out+outIdx, tmp, left);
 
-            outIdx += hashSz;
+            outIdx += left;
             n++;
         }