diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 72d697c..88f8ef4 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -2621,9 +2621,9 @@ offset_to_sec(VALUE vof, int *rof)
 		if (!FIXNUM_P(vn))
 		    return 0;
 		n = FIX2LONG(vn);
-		if (n < -DAY_IN_SECONDS || n > DAY_IN_SECONDS)
-		    return 0;
 	    }
+	    if (n < -DAY_IN_SECONDS || n > DAY_IN_SECONDS)
+		return 0;
 	    *rof = (int)n;
 	    return 1;
 	}
diff --git a/test/date/test_date_new.rb b/test/date/test_date_new.rb
index eddeeff..8973eef 100644
--- a/test/date/test_date_new.rb
+++ b/test/date/test_date_new.rb
@@ -192,6 +192,21 @@ def test_civil__ex
     end
   end
 
+  def test_civil__offset
+    d = DateTime.civil(2001,2,3, 0,0,0, Rational(1, 1))
+    assert_equal(1.to_r, d.offset)
+    d = DateTime.civil(2001,2,3, 0,0,0, Rational(-1, 1))
+    assert_equal(-1.to_r, d.offset)
+
+    # An out-of-range offset is ignored, as it is for the equivalent Integer.
+    d = DateTime.civil(2001,2,3, 0,0,0, 2)
+    assert_equal(0, d.offset)
+    d = DateTime.civil(2001,2,3, 0,0,0, Rational(2, 1))
+    assert_equal(0, d.offset)
+    d = DateTime.civil(2001,2,3, 0,0,0, Rational(49710, 1))
+    assert_equal(0, d.offset)
+  end
+
   def test_civil__reform
     d = Date.jd(Date::ENGLAND, Date::ENGLAND)
     dt = DateTime.jd(Date::ENGLAND, 0,0,0,0, Date::ENGLAND)