diff --git a/src/kernel/libroot/posix/signal/Jamfile b/src/kernel/libroot/posix/signal/Jamfile
index e7958beca0..a396ed155a 100644
--- a/src/kernel/libroot/posix/signal/Jamfile
+++ b/src/kernel/libroot/posix/signal/Jamfile
@@ -1,12 +1,20 @@
 SubDir OBOS_TOP src kernel libroot posix signal ;
 
 KernelMergeObject posix_signal.o :
+	<$(SOURCE_GRIST)>raise.c
+	<$(SOURCE_GRIST)>send_signal.c
+	<$(SOURCE_GRIST)>sigaction.c
+	<$(SOURCE_GRIST)>signal.c
 	<$(SOURCE_GRIST)>strsignal.c
 	:
 	-fPIC -DPIC
 	;
 
 MergeObjectFromObjects kernel_posix_signal.o :
+	<$(SOURCE_GRIST)>raise.o
+	<$(SOURCE_GRIST)>send_signal.o
+	<$(SOURCE_GRIST)>sigaction.o
+	<$(SOURCE_GRIST)>signal.o
 	<$(SOURCE_GRIST)>strsignal.o
 	:
 	-fPIC -DPIC