diff --git a/monitor/json_parser.cpp b/monitor/json_parser.cpp
index a46e2a9..1144998 100644
--- a/monitor/json_parser.cpp
+++ b/monitor/json_parser.cpp
@@ -198,7 +198,7 @@
         }
         // Valid deviation range is 0 - 100%
         auto deviation = fan["deviation"].get<size_t>();
-        if (deviation < 0 || 100 < deviation)
+        if (100 < deviation)
         {
             auto msg = fmt::format(
                 "Invalid deviation of {} found, must be between 0 and 100",