Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt	(revision 6289)
+++ CMakeLists.txt	(working copy)
@@ -261,6 +261,7 @@
 endif (WIN32)
 
 set (wsjt_FSRCS
+  lib/interfaces.f90
   lib/afc65b.f90
   lib/afc9.f90
   lib/ana932.f90
Index: lib/decoder.f90
===================================================================
--- lib/decoder.f90	(revision 6289)
+++ lib/decoder.f90	(working copy)
@@ -1,6 +1,7 @@
 subroutine decoder(ss,id2,nfsample)
 
   use prog_args
+  use interfaces
   !$ use omp_lib
 
   include 'constants.f90'
Index: lib/jt65.f90
===================================================================
--- lib/jt65.f90	(revision 6289)
+++ lib/jt65.f90	(working copy)
@@ -3,6 +3,7 @@
 ! Test the JT65 decoder for WSJT-X
 
   use options
+  use interfaces
   character c
   logical :: display_help=.false.
   parameter (NZMAX=60*12000)