diff --git a/src/mslice/plotting/plot_window/plot_options.py b/src/mslice/plotting/plot_window/plot_options.py
index c0c9acf2..d795cef9 100644
--- a/src/mslice/plotting/plot_window/plot_options.py
+++ b/src/mslice/plotting/plot_window/plot_options.py
@@ -7,7 +7,7 @@
 from qtpy.QtCore import Signal
 from mslice.models.colors import named_cycle_colors, color_to_name
 from mslice.util.qt import load_ui
-from qtpy.QtGui import QDoubleValidator, QRegExpValidator
+from qtpy.QtGui import QRegExpValidator
 from qtpy.QtCore import QRegExp
 from mantidqt.utils.qt.line_edit_double_validator import LineEditDoubleValidator
 from mantidqt.icons import get_icon