diff --git a/scripts/disk_io_pp.py b/scripts/disk_io_pp.py
index bf901d3..564e027 100644
--- a/scripts/disk_io_pp.py
+++ b/scripts/disk_io_pp.py
@@ -53,7 +53,7 @@
 
 plt.xlabel('Smarts')
 plt.ylabel('Probability')
-plt.title(r'Histogram of IQ: $\mu={}$, $\sigma={}$'.format(mu, sigma))
+plt.title(r'Histogram of IQ: $\mu={}$, $\sigma={}$'.format(int(mu), int(sigma)))
 
 # Tweak spacing to prevent clipping of ylabel
 plt.subplots_adjust(left=0.15)