diff --git a/services/capture/decklink-bridge/main.cpp b/services/capture/decklink-bridge/main.cpp
index 2aead7e..63f3e09 100644
--- a/services/capture/decklink-bridge/main.cpp
+++ b/services/capture/decklink-bridge/main.cpp
@@ -255,8 +255,8 @@ public:
         /* Detect format on first frame if format-change hasn't fired.
          * Use atomic exchange so only ONE thread runs the first-frame init
          * even if two frame callbacks race before signal_reported is set. */
-        bool expected = false;
-        if (m_ds->signal_reported.compare_exchange_strong(expected, true)) {
+        bool exp = false;
+        if (m_ds->signal_reported.compare_exchange_strong(exp, true)) {
             m_ds->width  = (int)videoFrame->GetWidth();
             m_ds->height = (int)videoFrame->GetHeight();
             if (m_ds->fps_num == 0) {