diff --git a/simgear/debug/CMakeLists.txt b/simgear/debug/CMakeLists.txt
index c016c333..886f550c 100644
--- a/simgear/debug/CMakeLists.txt
+++ b/simgear/debug/CMakeLists.txt
@@ -4,7 +4,7 @@ include (SimGearComponent)
 set(HEADERS debug_types.h 
     logstream.hxx BufferedLogCallback.hxx OsgIoCapture.hxx
     LogCallback.hxx LogEntry.hxx
-    ErrorReportingCallback.hxx)
+    ErrorReportingCallback.hxx logdelta.hxx)
 
 set(SOURCES logstream.cxx BufferedLogCallback.cxx
     LogCallback.cxx LogEntry.cxx logdelta.cxx