diff --git a/gprMax/grid.py b/gprMax/grid.py
index cee13cd2..15cc7df0 100644
--- a/gprMax/grid.py
+++ b/gprMax/grid.py
@@ -199,6 +199,7 @@ def dispersion_analysis(G):
 
                 # Get frequency for max power
                 freqmaxpower = np.where(power[1::] == np.amax(power[1::]))[0][0]
+                print(freqmaxpower)
                 print(freqs[freqmaxpower])
 
                 # Set maximum frequency to a threshold drop from maximum power, ignoring DC value