diff --git a/app/models/property.rb b/app/models/property.rb
index cec836d..e9726d5 100644
--- a/app/models/property.rb
+++ b/app/models/property.rb
@@ -119,7 +119,7 @@ class Property
             sdata = stime_tp.wday*10000 + stime_tp.hour*100 + stime_tp.minute
             edata = etime_tp.wday*10000 + etime_tp.hour*100 + etime_tp.minute
           end
-          if (b_sdata <= sdata && b_edata >= sdata) || (b_sdata >= sdata && b_edata <= edata) || (b_sdata <= edata && b_edata >= edata)
+          if (sdata <= b_sdata && edata >= b_sdata) || (sdata >= b_sdata && edata <= b_edata) || (sdata <= b_edata && edata >= b_edata)
             available = false
           end
           stime_tp = stime_tp + d_step