diff --git a/ctaocrypt/src/tfm.c b/ctaocrypt/src/tfm.c
index 55cee1c94..4e0cecd29 100644
--- a/ctaocrypt/src/tfm.c
+++ b/ctaocrypt/src/tfm.c
@@ -1611,7 +1611,7 @@ void fp_read_unsigned_bin(fp_int *a, unsigned char *b, int c)
 
   /* If we know the endianness of this architecture, and we're using
      32-bit fp_digits, we can optimize this */
-#if (defined(LITTLE_ENDIAN_ORDER) || defined(BIG_ENDIAN_ORDER)) && !defined(FP_64BIT)
+#if (defined(LITTLE_ENDIAN_ORDER) || defined(BIG_ENDIAN_ORDER)) && defined(FP_32BIT)
   /* But not for both simultaneously */
 #if defined(LITTLE_ENDIAN_ORDER) && defined(BIG_ENDIAN_ORDER)
 #error Both LITTLE_ENDIAN_ORDER and BIG_ENDIAN_ORDER defined.
diff --git a/cyassl/ctaocrypt/tfm.h b/cyassl/ctaocrypt/tfm.h
index fae7141bf..fd825babc 100644
--- a/cyassl/ctaocrypt/tfm.h
+++ b/cyassl/ctaocrypt/tfm.h
@@ -217,6 +217,7 @@
    #ifndef NO_64BIT
       typedef unsigned int       fp_digit;
       typedef ulong64            fp_word;
+      #define FP_32BIT
    #else
       /* some procs like coldfire prefer not to place multiply into 64bit type
          even though it exists */