diff --git a/lib/zxystream.js b/lib/zxystream.js
index 5816503..0c993f4 100644
--- a/lib/zxystream.js
+++ b/lib/zxystream.js
@@ -57,7 +57,11 @@ ZXYStream.prototype._read = function() {
             if (error) {
                 stream.emit('error', error);
             } else {
-                stream.push(lines || null);
+                if (lines) stream.push(lines);
+                else {
+                    stream.statement.finalize();
+                    stream.push(null);
+                }
             }
         }
     }
@@ -68,4 +72,3 @@ function toLine(row) {
     var y = row.y = (1 << row.z) - 1 - row.y;
     return row.z + '/' + row.x + '/' + y + '\n';
 }
-