diff --git a/R/ggplot-theme.R b/R/ggplot-theme.R
index 9612737a..882ae2ef 100644
--- a/R/ggplot-theme.R
+++ b/R/ggplot-theme.R
@@ -13,7 +13,7 @@ default_theme <- function() {
 # Check if user has set the theme
 is_theme_unset <- function() {
     isTRUE(all.equal(
-        .subset2(ggfun("ggplot_global"), "theme_default"),
+        complete_theme(.subset2(ggfun("ggplot_global"), "theme_default")),
         complete_theme(theme_get())
     ))
 }