diff --git a/src/service/acquisition/test/acqWorker_test.cpp b/src/service/acquisition/test/acqWorker_test.cpp
index c08178ba..b3a6c583 100644
--- a/src/service/acquisition/test/acqWorker_test.cpp
+++ b/src/service/acquisition/test/acqWorker_test.cpp
@@ -72,7 +72,7 @@ const boost::ut::suite basic_acq_worker_tests = [] {
 
         client.unsubscribe(URI("mds://127.0.0.1:12345/DeviceName/Acquisition?channelNameFilter=saw"));
         client.unsubscribe(URI("mds://127.0.0.1:12345/DeviceName/Acquisition"));
-        fmt::print("received client updates: {} for 'A' and {} for 'A,B'\n", receivedA, receivedAB);
+        fmt::print("received client updates: {} for 'A' and {} for 'A,B'\n", receivedA.load(), receivedAB.load());
         expect(int(receivedA) >= 2_i);
         expect(int(receivedAB) >= 2_i);
         client.stop();
diff --git a/src/service/main.cpp b/src/service/main.cpp
index 0d1b69ea..d9351c36 100644
--- a/src/service/main.cpp
+++ b/src/service/main.cpp
@@ -81,7 +81,7 @@ int main() {
 
     client.unsubscribe(URI("mds://127.0.0.1:12345/DeviceName/Acquisition?channelNameFilter=saw"));
     client.unsubscribe(URI("mds://127.0.0.1:12345/DeviceName/Acquisition"));
-    fmt::print("received client updates: {} for 'sine' and {} for 'sine,saw'\n", receivedA, receivedAB);
+    fmt::print("received client updates: {} for 'sine' and {} for 'sine,saw'\n", receivedA.load(), receivedAB.load());
     client.stop();
 
     // shutdown