diff --git a/src/13_semiconductors.md b/src/13_semiconductors.md
index 64e185b2af1d8f193d8da3f2426ac0de40ca478c..8b462c5195abbe8983bf250276c4c9a225813cf8 100644
--- a/src/13_semiconductors.md
+++ b/src/13_semiconductors.md
@@ -163,8 +163,8 @@ ax.set_ylim(top=1.5)
 
 ax.set_xlabel('$E$')
 ax.set_ylabel('$g$')
-ax.set_xticks([E_V, E_C, E_F])
-ax.set_xticklabels(['$E_V$', '$E_C$', '$E_F$'])
+# ax.set_xticks([E_V, E_C, E_F])
+# ax.set_xticklabels(['$E_V$', '$E_C$', '$E_F$'])
 ax.legend()
 draw_classic_axes(ax, xlabeloffset=.2)
 ```