diff --git a/utils/sdr/detection.py b/utils/sdr/detection.py
index f6b15cf..437895c 100644
--- a/utils/sdr/detection.py
+++ b/utils/sdr/detection.py
@@ -96,6 +96,7 @@ def detect_rtlsdr_devices() -> list[SDRDevice]:
             timeout=5,
             env=env 
         )
+        output = result.stderr + result.stdout
 
         # Parse device info from rtl_test output
         # Format: "0:  Realtek, RTL2838UHIDIR, SN: 00000001"
@@ -315,3 +316,4 @@ def detect_all_devices() -> list[SDRDevice]:
 
     return devices
 
+