diff --git a/src/headers/tomcrypt_pk.h b/src/headers/tomcrypt_pk.h
index 9674ef0..58bbefd 100644
--- a/src/headers/tomcrypt_pk.h
+++ b/src/headers/tomcrypt_pk.h
@@ -47,8 +47,9 @@ typedef struct {
   int radix;
 } ltc_pk_part;
 
-#define PK_PART_HEX(s) &((ltc_pk_part){s, 0, 16})
-#define PK_PART_DEC(s) &((ltc_pk_part){s, 0, 10})
+#define PK_PART_HEX(s)     &((ltc_pk_part){s, 0, 16})
+#define PK_PART_DEC(d)     &((ltc_pk_part){d, 0, 10})
+#define PK_PART_BIN(b, l)  &((ltc_pk_part){b, l, 256})
 
 /* ---- RSA ---- */
 #ifdef LTC_MRSA
diff --git a/tests/rsa_test.c b/tests/rsa_test.c
index 41a88df..25828d4 100644
--- a/tests/rsa_test.c
+++ b/tests/rsa_test.c
@@ -181,6 +181,7 @@ static int rsa_compat_test(void)
 {
    rsa_key key, pubkey;
    int stat;
+   void* mpi;
    unsigned char buf[1024];
    unsigned long len;
 
@@ -280,6 +281,20 @@ static int rsa_compat_test(void)
    }
    rsa_free(&key);
 
+   /* try import public key from mixed numbers */
+   DO(mp_init(&mpi));
+   DO(mp_read_radix(mpi, dec_N, 10));
+   DO(mp_to_unsigned_bin(mpi, buf));
+   len = mp_unsigned_bin_size(mpi);
+   DO(rsa_import_radix(PK_PART_BIN(buf, len), PK_PART_DEC(dec_e), NULL, NULL, NULL, NULL, NULL, NULL, &key));
+   mp_clear(mpi);
+   len = sizeof(buf);
+   DO(rsa_export(buf, &len, PK_PUBLIC, &key));
+   if (compare_testvector(buf, len, openssl_public_rsa_stripped, sizeof(openssl_public_rsa_stripped), "RSA public export (from mixed)", 0)) {
+      return 1;
+   }
+   rsa_free(&key);
+
    /* try export in SubjectPublicKeyInfo format of the public key */
    DO(rsa_import(openssl_public_rsa, sizeof(openssl_public_rsa), &key));
    len = sizeof(buf);