diff -wpruN --no-dereference '--exclude=*.orig' a~/src/mux_epoll.c a/src/mux_epoll.c
--- a~/src/mux_epoll.c	1970-01-01 00:00:00
+++ a/src/mux_epoll.c	1970-01-01 00:00:00
@@ -27,6 +27,7 @@ Contributors:
 
 #ifndef WIN32
 #ifdef WITH_EPOLL
+#include <signal.h>
 #include <sys/epoll.h>
 #define MAX_EVENTS 1000
 #endif