diff --git a/enhance/ridge_filter.py b/enhance/ridge_filter.py
index 9fd9e6a..302f586 100644
--- a/enhance/ridge_filter.py
+++ b/enhance/ridge_filter.py
@@ -77,7 +77,8 @@ def ridge_filter(im, orient, freq, kx, ky):
     sigmax = 1/unfreq[0]*kx;
     sigmay = 1/unfreq[0]*ky;
     
-    sze = np.round(3*np.max([sigmax,sigmay]));
+    #sze = np.round(3*np.max([sigmax,sigmay]));
+    sze = np.round(3*np.max([sigmax,sigmay])).astype('int');
     
     x,y = np.meshgrid(np.linspace(-sze,sze,(2*sze + 1)),np.linspace(-sze,sze,(2*sze + 1)));
     
@@ -138,4 +139,4 @@ def ridge_filter(im, orient, freq, kx, ky):
         
         newim[r][c] = np.sum(img_block * gabor_filter[int(orientindex[r][c]) - 1]);
         
-    return(newim);    
\ No newline at end of file
+    return(newim);