diff --git a/src/cas/build/singleThread/Makefile.Host b/src/cas/build/singleThread/Makefile.Host
index 1d93f3c62..0e2eff7b5 100644
--- a/src/cas/build/singleThread/Makefile.Host
+++ b/src/cas/build/singleThread/Makefile.Host
@@ -38,7 +38,6 @@ LIBSRCS += casMonEvent.cc
 LIBSRCS += inBuf.cc
 LIBSRCS += outBuf.cc
 LIBSRCS += dgInBuf.cc 
-LIBSRCS += dgOutBuf.cc
 LIBSRCS += casCtx.cc 
 LIBSRCS += casEventMask.cc
 LIBSRCS += ioBlocked.cc