diff --git a/CMakeLists.txt b/CMakeLists.txt
index 222baaf84..d8ec835ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -398,6 +398,7 @@ set (wsjt_FSRCS
   lib/morse.f90
   lib/move.f90
   lib/mskdt.f90
+  lib/msk144dt.f90
   lib/msk144d.f90
   lib/msk144_decode.f90
   lib/options.f90