diff --git a/wolfcrypt/src/integer.c b/wolfcrypt/src/integer.c
index 82df54c33..29c909bd1 100644
--- a/wolfcrypt/src/integer.c
+++ b/wolfcrypt/src/integer.c
@@ -3763,7 +3763,7 @@ int fast_s_mp_mul_high_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
     register mp_digit *tmpc;
 
     tmpc = c->dp + digs;
-    for (ix = digs; ix <= pa; ix++) {
+    for (ix = digs; ix < pa; ix++) {   /* TAO, <= could potentially overwrite */
       /* now extract the previous digit [below the carry] */
       *tmpc++ = W[ix];
     }