diff --git a/wolfcrypt/src/tfm.c b/wolfcrypt/src/tfm.c
index e9bf039b1..8f2881afb 100644
--- a/wolfcrypt/src/tfm.c
+++ b/wolfcrypt/src/tfm.c
@@ -4884,12 +4884,12 @@ int mp_copy(const fp_int* a, fp_int* b)
     return MP_OKAY;
 }
 
-int mp_isodd(mp_int* a)
+int mp_isodd(const mp_int* a)
 {
     return fp_isodd(a);
 }
 
-int mp_iszero(mp_int* a)
+int mp_iszero(const mp_int* a)
 {
     return fp_iszero(a);
 }
diff --git a/wolfssl/wolfcrypt/tfm.h b/wolfssl/wolfcrypt/tfm.h
index 221b4ce22..4c497266a 100644
--- a/wolfssl/wolfcrypt/tfm.h
+++ b/wolfssl/wolfcrypt/tfm.h
@@ -847,8 +847,8 @@ MP_API int  mp_to_unsigned_bin_len(mp_int * a, unsigned char *b, int c);
 
 MP_API int  mp_sub_d(fp_int *a, fp_digit b, fp_int *c);
 MP_API int  mp_copy(const fp_int* a, fp_int* b);
-MP_API int  mp_isodd(mp_int* a);
-MP_API int  mp_iszero(mp_int* a);
+MP_API int  mp_isodd(const mp_int* a);
+MP_API int  mp_iszero(const mp_int* a);
 MP_API int  mp_count_bits(const mp_int *a);
 MP_API int  mp_leading_bit(mp_int *a);
 MP_API int  mp_set_int(mp_int *a, unsigned long b);