diff --git a/Makefile.am b/Makefile.am
index 687420227..ca7b72a11 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -346,6 +346,7 @@ lmms_SOURCES =								\
 		$(srcdir)/include/journalling_object.h			\
 		$(srcdir)/include/level_object.h			\
 		$(srcdir)/include/project_journal.h			\
+		$(srcdir)/include/shared_object.h			\
 		$(srcdir)/include/import_filter.h			\
 		$(srcdir)/include/engine.h				\
 		$(srcdir)/include/effect.h				\