diff --git a/bn_mp_complement.c b/bn_mp_complement.c
index 256ddea..fae3a59 100644
--- a/bn_mp_complement.c
+++ b/bn_mp_complement.c
@@ -17,7 +17,7 @@
 int mp_complement(const mp_int *a, mp_int *b)
 {
    int res = mp_neg(a, b);
-   return res == MP_OKAY ? mp_sub_d(b, 1, b) : res;
+   return res == MP_OKAY ? mp_sub_d(b, 1uL, b) : res;
 }
 #endif
 
diff --git a/bn_mp_tc_and.c b/bn_mp_tc_and.c
index 800681a..2969116 100644
--- a/bn_mp_tc_and.c
+++ b/bn_mp_tc_and.c
@@ -22,7 +22,7 @@ int mp_tc_and(const mp_int *a, const mp_int *b, mp_int *c)
 
    if (as || bs) {
       bits = MAX(mp_count_bits(a), mp_count_bits(b));
-      res = mp_init_set_int(&_mx, 1);
+      res = mp_init_set_int(&_mx, 1uL);
       if (res != MP_OKAY) {
          goto end;
       }
diff --git a/bn_mp_tc_div_2d.c b/bn_mp_tc_div_2d.c
index f341c9b..88aa2f8 100644
--- a/bn_mp_tc_div_2d.c
+++ b/bn_mp_tc_div_2d.c
@@ -21,13 +21,13 @@ int mp_tc_div_2d(const mp_int *a, int b, mp_int *c)
     return mp_div_2d(a, b, c, NULL);
   }
 
-  res = mp_add_d(a, 1, c);
+  res = mp_add_d(a, 1uL, c);
   if (res != MP_OKAY) {
     return res;
   }
 
   res = mp_div_2d(c, b, c, NULL);
-  return res == MP_OKAY ? mp_sub_d(c, 1, c) : res;
+  return res == MP_OKAY ? mp_sub_d(c, 1uL, c) : res;
 }
 #endif
 
diff --git a/bn_mp_tc_or.c b/bn_mp_tc_or.c
index 344c20c..d3f1100 100644
--- a/bn_mp_tc_or.c
+++ b/bn_mp_tc_or.c
@@ -22,7 +22,7 @@ int mp_tc_or(const mp_int *a, const mp_int *b, mp_int *c)
 
    if (as || bs) {
       bits = MAX(mp_count_bits(a), mp_count_bits(b));
-      res = mp_init_set_int(&_mx, 1);
+      res = mp_init_set_int(&_mx, 1uL);
       if (res != MP_OKAY) {
          goto end;
       }
diff --git a/bn_mp_tc_xor.c b/bn_mp_tc_xor.c
index 09547a5..e1de859 100644
--- a/bn_mp_tc_xor.c
+++ b/bn_mp_tc_xor.c
@@ -22,7 +22,7 @@ int mp_tc_xor(const mp_int *a, const mp_int *b, mp_int *c)
 
    if (as || bs) {
       bits = MAX(mp_count_bits(a), mp_count_bits(b));
-      res = mp_init_set_int(&_mx, 1);
+      res = mp_init_set_int(&_mx, 1uL);
       if (res != MP_OKAY) {
          goto end;
       }