diff --git a/wolfcrypt/src/integer.c b/wolfcrypt/src/integer.c
index c91d8331a..1d25ba831 100644
--- a/wolfcrypt/src/integer.c
+++ b/wolfcrypt/src/integer.c
@@ -3177,7 +3177,7 @@ int fast_s_mp_mul_digs (mp_int * a, mp_int * b, mp_int * c, int digs)
   {
     mp_digit *tmpc;
     tmpc = c->dp;
-    for (ix = 0; ix < pa+1; ix++) {
+    for (ix = 0; ix < pa; ix++) { /* JRB, +1 could read uninitialized data */
       /* now extract the previous digit [below the carry] */
       *tmpc++ = W[ix];
     }