diff --git a/src/xy2pix.m b/src/xy2pix.m
index c7c5b69..8cf8fbe 100644
--- a/src/xy2pix.m
+++ b/src/xy2pix.m
@@ -67,6 +67,7 @@
 
 ipix = ipf + nFace*nSide^2;
 
-ipix = ipix+1; % MEALPix numbering
+% Is this a bug?
+%ipix = ipix+1; % MEALPix numbering
 
-return
\ No newline at end of file
+return