diff --git a/sortix/include/sortix/sigset.h b/sortix/include/sortix/sigset.h
new file mode 100644
index 00000000..05b1d135
--- /dev/null
+++ b/sortix/include/sortix/sigset.h
@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+ This file is part of Sortix.
+
+ Sortix is free software: you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation, either version 3 of the License, or (at your option) any later
+ version.
+
+ Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ details.
+
+ You should have received a copy of the GNU General Public License along with
+ Sortix. If not, see .
+
+ sortix/sigset.h
+ Declaration of the sigset_t structure.
+
+*******************************************************************************/
+
+#ifndef INCLUDE_SORTIX_SIGSET_H
+#define INCLUDE_SORTIX_SIGSET_H
+
+#include
+
+__BEGIN_DECLS
+
+typedef struct
+{
+ unsigned long __val[(1024 / (8 * sizeof (unsigned long int)))];
+} sigset_t;
+
+__END_DECLS
+
+#endif