diff --git a/aperoll/star_field_items.py b/aperoll/star_field_items.py
index 46c7e11..6f4881e 100644
--- a/aperoll/star_field_items.py
+++ b/aperoll/star_field_items.py
@@ -302,6 +302,14 @@ def set_excluded(self, excluded):
         self._line_1.setPen(pen)
         self._line_2.setPen(pen)
 
+    def set_fiducial(self, fiducial):
+        color = QtG.QColor("red") if fiducial else QtG.QColor("blue")
+        pen = self.pen()
+        pen.setColor(color)
+        self.setPen(pen)
+        self._line_1.setPen(pen)
+        self._line_2.setPen(pen)
+
 
 class FidLight(QtW.QGraphicsEllipseItem):
     """
@@ -571,9 +579,9 @@ def set_show_centroids(self, show=True):
             | (row > 511)
             | (col < -511)
             | (col > 511)
-            | (self._centroids["IMGFID"])
         )
         for i, centroid in enumerate(self.centroids):
+            centroid.set_fiducial(self._centroids["IMGFID"][i])
             if off_ccd[i]:
                 centroid.setVisible(False)
             else: