1 files changed, 3 insertions, 3 deletions
diff --git a/bignum.c b/bignum.c
index 33969c400c..043e799366 100644
--- a/bignum.c
+++ b/bignum.c
@@ -42,11 +42,11 @@ static VALUE
 bignew_1(klass, len, sign)
     VALUE klass;
     long len;
-    char sign;
+    int sign;
 {
     NEWOBJ(big, struct RBignum);
     OBJSETUP(big, klass, T_BIGNUM);
-    big->sign = sign;
+    big->sign = (char)sign;
     big->len = len;
     big->digits = ALLOC_N(BDIGIT, len);
 
@@ -1112,7 +1112,7 @@ bigsub(x, y)
 static VALUE
 bigadd(x, y, sign)
     VALUE x, y;
-    char sign;
+    int sign;
 {
     VALUE z;
     BDIGIT_DBL num;