diff --git a/NAMESPACE b/NAMESPACE
index 00434f0..0982562 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -1,6 +1,8 @@
 # Generated by roxygen2: do not edit by hand
 
+S3method("&","ggplot2::gg")
 S3method("&",gg)
+S3method("*","ggplot2::gg")
 S3method("*",gg)
 S3method("-",ggplot)
 S3method("/",ggplot)
diff --git a/R/arithmetic.R b/R/arithmetic.R
index b0434b5..084cbed 100644
--- a/R/arithmetic.R
+++ b/R/arithmetic.R
@@ -141,3 +141,9 @@ NULL
   }
   e1 + e2
 }
+
+#' @export
+"*.ggplot2::gg" <- `*.gg`
+
+#' @export
+"&.ggplot2::gg" <- `&.gg`