diff --git a/da_detector.py b/da_detector.py
index 22ad9f5..2e93a5a 100755
--- a/da_detector.py
+++ b/da_detector.py
@@ -29,7 +29,7 @@ class da_detector:
 			raise e
 		return data
 
-	def parse_freqs(self, path):
+	def parse_freqs(self, path: str):
 		import json
 
 		fullpath = freqs_folder + path