diff --git a/src/frontends/Makefile.am b/src/frontends/Makefile.am
index a33b0048e3..7fb67b402b 100644
--- a/src/frontends/Makefile.am
+++ b/src/frontends/Makefile.am
@@ -19,7 +19,6 @@ libfrontends_la_SOURCES = \
 	Alert_pimpl.h \
 	Dialogs.C \
 	Dialogs.h \
-	DialogBase.h \
 	FileDialog.h \
 	Liason.C \
 	Liason.h \
@@ -41,6 +40,7 @@ libfrontends_la_SOURCES = \
 	WorkAreaFactory.h \
 	font_metrics.h \
 	guiapi.h \
+	guiapi.C \
 	key_state.h \
 	lyx_gui.h \
 	mouse_state.h \