diff --git a/check_bandwidth.py b/check_bandwidth.py
index 6d7dd47..bf8ce33 100755
--- a/check_bandwidth.py
+++ b/check_bandwidth.py
@@ -53,7 +53,7 @@ for i in range(len(data)):
     else:
         ok.append(interface)
         data[i][2] = 'ok'
-    perf_data.append(f'{interface}={round(bandwidth_utilization, 2)}MB;{warn_value};{crit_value}; ')
+    perf_data.append(f'{interface}={round(bandwidth_utilization, 2)}B;{warn_value};{crit_value}; ')
 
 if len(ok):
     print(f'OK: {", ".join(ok)}')