diff --git a/gui/src/aaregui/panels/reference_tools_panel.py b/gui/src/aaregui/panels/reference_tools_panel.py
index edb0e8e9..b65f8054 100644
--- a/gui/src/aaregui/panels/reference_tools_panel.py
+++ b/gui/src/aaregui/panels/reference_tools_panel.py
@@ -116,7 +116,7 @@ class ReferenceToolsModel(QAbstractTableModel):
 
 class ReferenceToolsPanel(QFrame):
     mount = Signal(SampleShortInfo, bool)
-    unmount = Signal(SampleShortInfo)
+    unmount = Signal()
 
     def __init__(self, samples: SampleShortInfoList | None = None, parent=None, refresh_interval_ms: int = 5000):
         """