diff --git a/artiq/gui/experiments.py b/artiq/gui/experiments.py
index aeb4cfff4..0cb11bbe1 100644
--- a/artiq/gui/experiments.py
+++ b/artiq/gui/experiments.py
@@ -18,6 +18,15 @@ logger = logging.getLogger(__name__)
 # 2. file:<class name>@<file name>
 
 
+class _WheelFilter(QtCore.QObject):
+    def eventFilter(self, obj, event):
+        if (event.type() == QtCore.QEvent.Wheel and
+                event.modifiers() != QtCore.Qt.NoModifier):
+            event.ignore()
+            return True
+        return False
+
+
 class _ArgumentEditor(QtWidgets.QTreeWidget):
     def __init__(self, manager, dock, expurl):
         self.manager = manager
@@ -38,6 +47,8 @@ class _ArgumentEditor(QtWidgets.QTreeWidget):
         self.setHorizontalScrollMode(QtWidgets.QAbstractItemView.ScrollPerPixel)
         self.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollPerPixel)
 
+        self.viewport().installEventFilter(_WheelFilter(self.viewport()))
+
         self._groups = dict()
         self._arg_to_entry_widgetitem = dict()