diff --git a/splitwavepy/core/window.py b/splitwavepy/core/window.py
index ba18499..198a1df 100644
--- a/splitwavepy/core/window.py
+++ b/splitwavepy/core/window.py
@@ -37,7 +37,7 @@ def start(self,samps):
         if samps%2 != 1:
             raise Exception('samps must be odd to have definite centre')
         else:
-            centre = np.int(samps/2)
+            centre = int(samps/2)
             return centre + self.offset - hw
 
     def end(self,samps):