diff --git a/bn_mp_decr.c b/bn_mp_decr.c
index 7e8c2ea..c6a1572 100644
--- a/bn_mp_decr.c
+++ b/bn_mp_decr.c
@@ -6,12 +6,12 @@
 /* Decrement "a" by one like "a--". Changes input! */
 mp_err mp_decr(mp_int *a)
 {
-   mp_err err = MP_OKAY;
    if (MP_IS_ZERO(a)) {
       mp_set(a,1uL);
       a->sign = MP_NEG;
       return MP_OKAY;
    } else if (a->sign == MP_NEG) {
+      mp_err err;
       a->sign = MP_ZPOS;
       if ((err = mp_incr(a)) != MP_OKAY) {
          return err;
diff --git a/bn_mp_incr.c b/bn_mp_incr.c
index d72a5b4..5d0039e 100644
--- a/bn_mp_incr.c
+++ b/bn_mp_incr.c
@@ -6,11 +6,11 @@
 /* Increment "a" by one like "a++". Changes input! */
 mp_err mp_incr(mp_int *a)
 {
-   mp_err err = MP_OKAY;
    if (MP_IS_ZERO(a)) {
       mp_set(a,1uL);
       return MP_OKAY;
    } else if (a->sign == MP_NEG) {
+      mp_err err;
       a->sign = MP_ZPOS;
       if ((err = mp_decr(a)) != MP_OKAY) {
          return err;
diff --git a/bn_mp_kronecker.c b/bn_mp_kronecker.c
index f6b33cd..8245e84 100644
--- a/bn_mp_kronecker.c
+++ b/bn_mp_kronecker.c
@@ -20,7 +20,7 @@
 mp_err mp_kronecker(const mp_int *a, const mp_int *p, int *c)
 {
    mp_int a1, p1, r;
-   mp_err err = MP_OKAY;
+   mp_err err;
    int v, k;
 
    static const int table[8] = {0, 1, 0, -1, 0, -1, 0, 1};
@@ -28,16 +28,15 @@ mp_err mp_kronecker(const mp_int *a, const mp_int *p, int *c)
    if (MP_IS_ZERO(p)) {
       if ((a->used == 1) && (a->dp[0] == 1u)) {
          *c = 1;
-         return err;
       } else {
          *c = 0;
-         return err;
       }
+      return MP_OKAY;
    }
 
    if (MP_IS_EVEN(a) && MP_IS_EVEN(p)) {
       *c = 0;
-      return err;
+      return MP_OKAY;
    }
 
    if ((err = mp_init_copy(&a1, a)) != MP_OKAY) {