diff --git a/spotproviders/wota.py b/spotproviders/wota.py
index 9dbdd27..1c1bb12 100644
--- a/spotproviders/wota.py
+++ b/spotproviders/wota.py
@@ -47,7 +47,8 @@ class WOTA(HTTPSpotProvider):
                 freq_mode = desc_split[0].replace("Frequencies/modes:", "").strip()
                 freq_mode_split = re.split(r'[\-\s]+', freq_mode)
                 freq_hz = float(freq_mode_split[0]) * 1000000
-                mode = freq_mode_split[1].upper()
+                if len(freq_mode_split) > 1:
+                    mode = freq_mode_split[1].upper()
 
                 comment = None
                 if len(desc_split) > 1: