diff --git a/lib/Makefile.am b/lib/Makefile.am
index 28cac171a0..130b08efe7 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -34,7 +34,9 @@ libboinc_a_SOURCES =				\
 	shmem.h					\
 	synch.h					\
 	util.h					\
-	base64.h
+	base64.h				\
+	sighandle.C				\
+	sighandle.h
 
 # libboinc_graphics_a_SOURCES =			\
 #         ../api/graphics_api.C			\