diff --git a/examples/SmallCosmoVolume_cooling/plotTempEvolution.py b/examples/SmallCosmoVolume_cooling/plotTempEvolution.py
index 118ef750b8d50ae4830df0008a0fc6ea218ee6a8..790e80bf9bf26a849da9ded26a7b59cd1fe51b0e 100644
--- a/examples/SmallCosmoVolume_cooling/plotTempEvolution.py
+++ b/examples/SmallCosmoVolume_cooling/plotTempEvolution.py
@@ -163,7 +163,7 @@ legend(loc="upper left", frameon=False, handlelength=1.5)
 
 # Cooling model
 if cooling_model == "Constant Lambda":
-    text(1e-2, 6e4, "$\Lambda_{\\rm const} = %.1f\\times10^{%d}~[\\rm{cgs}]$"%(Lambda/10.**(int(log10(Lambda))), log10(Lambda)), fontsize=8)
+    text(1e-2, 6e4, "$\Lambda_{\\rm const}/n_{\\rm H}^2 = %.1f\\times10^{%d}~[\\rm{cgs}]$"%(Lambda/10.**(int(log10(Lambda))), log10(Lambda)), fontsize=7)
 else:
     text(1e-2, 6e4, "No cooling")