diff --git a/cat_vol_sanlm.m b/cat_vol_sanlm.m
index 4a980868..a249429b 100644
--- a/cat_vol_sanlm.m
+++ b/cat_vol_sanlm.m
@@ -371,6 +371,8 @@
             clear srcRS srcr srcR;
             src = src / 2;
           end
+        else
+          NCstrr1 = 0; NCstrr2 = 0; 
         end
         
         NCstrr = mean([NCstrr1 NCstrr2]); % or sum() / 2 ;