diff --git a/protobuf/Makefile b/protobuf/Makefile
index 3787d7606..178fd2e45 100644
--- a/protobuf/Makefile
+++ b/protobuf/Makefile
@@ -30,6 +30,7 @@ PROTO_FILES	+= eventfd.proto
 PROTO_FILES	+= eventpoll.proto
 PROTO_FILES	+= fh.proto
 PROTO_FILES	+= inotify.proto
+PROTO_FILES	+= signalfd.proto
 PROTO_FILES	+= fs.proto
 PROTO_FILES	+= pstree.proto
 PROTO_FILES	+= pipe.proto
diff --git a/protobuf/fdinfo.proto b/protobuf/fdinfo.proto
index cedc40062..057b3ff89 100644
--- a/protobuf/fdinfo.proto
+++ b/protobuf/fdinfo.proto
@@ -8,6 +8,7 @@ enum fd_types {
 	EVENTFD		= 6;
 	EVENTPOLL	= 7;
 	INOTIFY		= 8;
+	SIGNALFD	= 9;
 }
 
 message fdinfo_entry {
diff --git a/protobuf/signalfd.proto b/protobuf/signalfd.proto
new file mode 100644
index 000000000..55372f893
--- /dev/null
+++ b/protobuf/signalfd.proto
@@ -0,0 +1,8 @@
+import "fown.proto";
+
+message signalfd_entry {
+	required uint32		id		= 1;
+	required uint32		flags		= 2;
+	required fown_entry	fown		= 3;
+	required uint64		sigmask		= 4;
+};