diff --git a/cyassl/ctaocrypt/integer.h b/cyassl/ctaocrypt/integer.h
index 114f63ef9..200072d19 100644
--- a/cyassl/ctaocrypt/integer.h
+++ b/cyassl/ctaocrypt/integer.h
@@ -82,9 +82,9 @@ extern "C" {
 #ifdef MP_8BIT
    typedef unsigned char      mp_digit;
    typedef unsigned short     mp_word;
-#elif defined(MP_16BIT)
+#elif (defined(MP_16BIT) || defined(NO_64BIT))
    typedef unsigned short     mp_digit;
-   typedef unsigned long      mp_word;
+   typedef unsigned int       mp_word;
 #elif defined(MP_64BIT)
    /* for GCC only on supported platforms */
 #ifndef CRYPT
diff --git a/cyassl/ctaocrypt/tfm.h b/cyassl/ctaocrypt/tfm.h
index 314feb608..b42dfdeaf 100644
--- a/cyassl/ctaocrypt/tfm.h
+++ b/cyassl/ctaocrypt/tfm.h
@@ -54,6 +54,7 @@
 #endif
 
 
+#ifndef NO_64BIT
 /* autodetect x86-64 and make sure we are using 64-bit digits with x86-64 asm */
 #if defined(__x86_64__)
    #if defined(TFM_X86) || defined(TFM_SSE2) || defined(TFM_ARM) 
@@ -72,6 +73,7 @@
 #if defined(__x86_64__) && !defined(FP_64BIT)
     #define FP_64BIT
 #endif
+#endif /* NO_64BIT */
 
 /* try to detect x86-32 */
 #if defined(__i386__) && !defined(TFM_SSE2)
@@ -214,8 +216,15 @@
       typedef signed long long   long64;
    #endif
 #endif
-   typedef unsigned int       fp_digit;
-   typedef ulong64            fp_word;
+   #ifndef NO_64BIT
+      typedef unsigned int       fp_digit;
+      typedef ulong64            fp_word;
+   #else
+      /* some procs like coldfire prefer not to place multiply into 64bit type
+         even though it exists */
+      typedef unsigned short     fp_digit;
+      typedef unsigned int       fp_word;
+   #endif
 #endif
 
 /* # of digits this is */