diff --git a/lib/libkse/thread/Makefile.inc b/lib/libkse/thread/Makefile.inc
index 4e51c6f9836..974cdb1ad1e 100644
--- a/lib/libkse/thread/Makefile.inc
+++ b/lib/libkse/thread/Makefile.inc
@@ -78,6 +78,8 @@ SRCS+= \
 	thr_seterrno.c \
 	thr_setprio.c \
 	thr_setschedparam.c \
+	thr_sig.c \
+	thr_sigaction.c \
 	thr_sigmask.c \
 	thr_sigsuspend.c \
 	thr_sigwait.c \
diff --git a/lib/libpthread/thread/Makefile.inc b/lib/libpthread/thread/Makefile.inc
index 4e51c6f9836..974cdb1ad1e 100644
--- a/lib/libpthread/thread/Makefile.inc
+++ b/lib/libpthread/thread/Makefile.inc
@@ -78,6 +78,8 @@ SRCS+= \
 	thr_seterrno.c \
 	thr_setprio.c \
 	thr_setschedparam.c \
+	thr_sig.c \
+	thr_sigaction.c \
 	thr_sigmask.c \
 	thr_sigsuspend.c \
 	thr_sigwait.c \