diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6fe51a4a2..4d4bb593f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -305,7 +305,7 @@ set (wsjtx_CXXSRCS
   logbook/logbook.cpp
   psk_reporter.cpp
   Modulator.cpp
-  Detector.cpp
+  Detector/Detector.cpp
   widgets/logqso.cpp
   widgets/displaytext.cpp
   decodedtext.cpp