diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index 16ddd91..d3b667f 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -316,7 +316,7 @@
         static int cmp(void const* lhs, void const* rhs) {
             sensors_event_t const* l = static_cast<sensors_event_t const*>(lhs);
             sensors_event_t const* r = static_cast<sensors_event_t const*>(rhs);
-            return r->timestamp - l->timestamp;
+            return l->timestamp - r->timestamp;
         }
     };
     qsort(buffer, count, sizeof(sensors_event_t), compar::cmp);