diff --git a/jdaviz/configs/cubeviz/plugins/tools.py b/jdaviz/configs/cubeviz/plugins/tools.py
index 1b37c4f2b4..1eb1170227 100644
--- a/jdaviz/configs/cubeviz/plugins/tools.py
+++ b/jdaviz/configs/cubeviz/plugins/tools.py
@@ -163,7 +163,7 @@ def _mouse_move_worker(self, x, y):
             self.viewer.stop_stream()
         else:
             y_values = spectrum.flux[x, y, :].value
-            if not np.all(np.isfinite(y_values)):
+            if not np.any(np.isfinite(y_values)):
                 self._mark.visible = False
                 return
             self._mark.update_xy(spectrum.spectral_axis.value, y_values)