diff --git a/src/TaskAprsIs.cpp b/src/TaskAprsIs.cpp
index d2fe06d..b96b06e 100644
--- a/src/TaskAprsIs.cpp
+++ b/src/TaskAprsIs.cpp
@@ -40,7 +40,7 @@ bool AprsIsTask::loop(System &system) {
   return true;
 }
 
-bool AprsIsTask::connect(System &system) {
+bool AprsIsTask::connect(const System &system) {
   logPrintI("connecting to APRS-IS server: ");
   logPrintI(system.getUserConfig()->aprs_is.server);
   logPrintI(" on port: ");
diff --git a/src/TaskAprsIs.h b/src/TaskAprsIs.h
index 30679db..de75fec 100644
--- a/src/TaskAprsIs.h
+++ b/src/TaskAprsIs.h
@@ -19,7 +19,7 @@ private:
 
   TaskQueue<std::shared_ptr<APRSMessage>> &_toAprsIs;
 
-  bool connect(System &system);
+  bool connect(const System &system);
 };
 
 #endif