diff --git a/src/backend/Makefile.am b/src/backend/Makefile.am
index 2cde41ae2..c452814db 100644
--- a/src/backend/Makefile.am
+++ b/src/backend/Makefile.am
@@ -28,6 +28,7 @@ liblumibackend_a_SOURCES =					\
 	$(liblumibackend_a_srcdir)/filehandle.c			\
 	$(liblumibackend_a_srcdir)/filedescriptor.c		\
 	$(liblumibackend_a_srcdir)/filehandlecache.c		\
+	$(liblumibackend_a_srcdir)/interfaceregistry.c		\
 	$(liblumibackend_a_srcdir)/config.c			\
 	$(liblumibackend_a_srcdir)/config_typed.c 		\
 	$(liblumibackend_a_srcdir)/config_wordlist.c 		\
@@ -44,6 +45,7 @@ noinst_HEADERS +=						\
 	$(liblumibackend_a_srcdir)/filehandle.h			\
 	$(liblumibackend_a_srcdir)/filedescriptor.h		\
 	$(liblumibackend_a_srcdir)/filehandlecache.h		\
+	$(liblumibackend_a_srcdir)/interfaceregistry.h		\
 	$(liblumibackend_a_srcdir)/config.h 			\
 	$(liblumibackend_a_srcdir)/configentry.h 		\
 	$(liblumibackend_a_srcdir)/configitem.h 		\
diff --git a/src/backend/interfaceregistry.c b/src/backend/interfaceregistry.c
index 89d26fe60..d3f070b56 100644
--- a/src/backend/interfaceregistry.c
+++ b/src/backend/interfaceregistry.c
@@ -42,7 +42,6 @@ NOBUG_DEFINE_FLAG_PARENT (interfaceregistry, backend);
 static PSplay interfaceregistry;
 lumiera_mutex lumiera_interface_mutex;
 
-
 static int
 cmp_fn (const void* keya, const void* keyb);