1 files changed, 13 insertions, 12 deletions
diff --git a/numeric.c b/numeric.c
index 28ac6ca8a1..4f181035ae 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1600,20 +1600,21 @@ check_int(num)
 }
 
 static void
-check_uint(num)
+check_uint(num, sign)
     unsigned long num;
+    VALUE sign;
 {
     static const unsigned long mask = ~(unsigned long)UINT_MAX;
-    static const unsigned long msb = ~LONG_MAX;
-    const char *s;
 
-    if ((num & mask) != 0 &&
-	((num & mask) != mask || (num & ~mask) <= INT_MAX + 1UL)) {
-	if ((num & msb) == 0)
-	    s = "big";
-	else
-	    s = "small";
-	rb_raise(rb_eRangeError, "integer %ld too %s to convert to `unsigned int'", num, s);
+    if (RTEST(sign)) {
+	/* minus */
+	if ((num & mask) != mask || (num & ~mask) <= INT_MAX + 1UL)
+	    rb_raise(rb_eRangeError, "integer %ld too small to convert to `unsigned int'", num);
+    }
+    else {
+	/* plus */
+	if ((num & mask) != 0)
+	    rb_raise(rb_eRangeError, "integer %lu too big to convert to `unsigned int'", num);
     }
 }
 
@@ -1643,7 +1644,7 @@ rb_num2uint(val)
 {
     unsigned long num = rb_num2ulong(val);
 
-    check_uint(num);
+    check_uint(num, rb_funcall(val, '<', 1, INT2FIX(0)));
     return num;
 }
 
@@ -1658,7 +1659,7 @@ rb_fix2uint(val)
     }
     num = FIX2ULONG(val);
 
-    check_uint(num);
+    check_uint(num, rb_funcall(val, '<', 1, INT2FIX(0)));
     return num;
 }
 #else