diff --git a/src/client/Makefile.am b/src/client/Makefile.am
index 3621ef1a66..a79b720aa3 100644
--- a/src/client/Makefile.am
+++ b/src/client/Makefile.am
@@ -44,7 +44,6 @@ BUILT_SOURCES = lyxclient.cpp
 CLEANFILES += lyxclient.cpp
 
 lyxclient_SOURCES = lyxclient.cpp $(HEADERFILES)
-CLEANFILES += lyxclient.cpp
 
 else