1 files changed, 1 insertions, 1 deletions
diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index 1d3fb1f6ea..4edb2c6d9b 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -174,7 +174,7 @@ void SingleThreadedSchedulerClient::ProcessQueue() {
     // to ensure both happen safely even if callback() throws.
     struct RAIICallbacksRunning {
         SingleThreadedSchedulerClient* instance;
-        RAIICallbacksRunning(SingleThreadedSchedulerClient* _instance) : instance(_instance) {}
+        explicit RAIICallbacksRunning(SingleThreadedSchedulerClient* _instance) : instance(_instance) {}
         ~RAIICallbacksRunning() {
             {
                 LOCK(instance->m_cs_callbacks_pending);