diff --git a/libc/Makefile b/libc/Makefile
index 97e2a8ee..dafe6359 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -224,6 +224,7 @@ poll/poll.o \
poll/ppoll.o \
pwd/pwent.o \
signal/kill.o \
+signal/killpg.o \
signal/psignal.o \
signal/raise.o \
signal/sigaction.o \
diff --git a/libc/signal/killpg.cpp b/libc/signal/killpg.cpp
new file mode 100644
index 00000000..00bee597
--- /dev/null
+++ b/libc/signal/killpg.cpp
@@ -0,0 +1,30 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with the Sortix C Library. If not, see .
+
+ signal/killpg.cpp
+ Send signal to a process group.
+
+*******************************************************************************/
+
+#include
+
+extern "C" int killpg(pid_t pgid, int signum)
+{
+ return kill(-pgid, signum);
+}