diff --git a/phpactor.el b/phpactor.el
index c311653..71c91b9 100644
--- a/phpactor.el
+++ b/phpactor.el
@@ -216,7 +216,7 @@
               (point-min) (point-max)))
     (:path (phpactor--expand-local-file-name buffer-file-name))
     (:source_path (phpactor--expand-local-file-name buffer-file-name))
-    (:offset (1- (point)))
+    (:offset (1- (position-bytes (point))))
     (:current_path (phpactor--expand-local-file-name buffer-file-name))
     (t (error "`%s' is unknown argument" key))))