diff --git a/src/ert/gui/main_window.py b/src/ert/gui/main_window.py
index b8f4a7d26dd..1bbe1474cf7 100644
--- a/src/ert/gui/main_window.py
+++ b/src/ert/gui/main_window.py
@@ -84,9 +84,7 @@ def __init__(
self._experiment_panel: Optional[ExperimentPanel] = None
self._plot_window: Optional[PlotWindow] = None
self._manage_experiments_panel: Optional[ManageExperimentsPanel] = None
- self._add_sidebar_button(
- "Start simulation", QIcon("img:play_circle_outlined.svg")
- )
+ self._add_sidebar_button("Start simulation", QIcon("img:library_add.svg"))
self._add_sidebar_button("Create plot", QIcon("img:timeline.svg"))
self._add_sidebar_button("Manage experiments", QIcon("img:build_wrench.svg"))
self.results_button = self._add_sidebar_button(
diff --git a/src/ert/gui/resources/gui/img/library_add.svg b/src/ert/gui/resources/gui/img/library_add.svg
new file mode 100644
index 00000000000..cd06455de73
--- /dev/null
+++ b/src/ert/gui/resources/gui/img/library_add.svg
@@ -0,0 +1 @@
+
diff --git a/src/ert/gui/resources/gui/img/play_circle_outlined.svg b/src/ert/gui/resources/gui/img/play_circle_outlined.svg
deleted file mode 100644
index a2706ec51bb..00000000000
--- a/src/ert/gui/resources/gui/img/play_circle_outlined.svg
+++ /dev/null
@@ -1 +0,0 @@
-