diff --git a/modules/util/util.py b/modules/util/util.py
index 5b5d8853349090921bc54e910bc0970d36e4e202..7c4c2d696f2d2c3b1fa7e5eb0fa1e583ae8ea550 100644
--- a/modules/util/util.py
+++ b/modules/util/util.py
@@ -80,7 +80,7 @@ def pressure_to_altitude(pres, temp, prof_pres, prof_temp, sfc_pres=None, sfc_te
     temp_s = [temp] + temp_s[i_top:]
 
     if sfc_pres is not None:
-        if pres > sfc_pres: # incoming pressure below surface
+        if pres > sfc_pres:  # incoming pressure below surface
             return -1
 
         prof_pres = np.array(pres_s)