diff --git a/CMakeLists.txt b/CMakeLists.txt
index 74f382421..a8093b100 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -566,7 +566,6 @@ set (wsjt_FSRCS
   lib/sync64.f90
   lib/sync65.f90
   lib/ft4/getcandidates4.f90
-  lib/ft4/syncft4.f90
   lib/ft8/sync8.f90
   lib/ft8/sync8d.f90
   lib/ft4/sync4d.f90