1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/org/traccar/database/StatisticsManager.java b/src/main/java/org/traccar/database/StatisticsManager.java
index 21b59540e..1ed232850 100644
--- a/src/main/java/org/traccar/database/StatisticsManager.java
+++ b/src/main/java/org/traccar/database/StatisticsManager.java
@@ -88,7 +88,7 @@ public class StatisticsManager {
                 if (!deviceProtocols.isEmpty()) {
                     Map<String, Integer> protocols = new HashMap<>();
                     for (String protocol : deviceProtocols.values()) {
-                        protocols.compute(protocol, (key, count) -> count != null ? count += 1 : 1);
+                        protocols.compute(protocol, (key, count) -> count != null ? count + 1 : 1);
                     }
                     statistics.setProtocols(protocols);
                 }