diff --git a/src/ngircd/irc-login.c b/src/ngircd/irc-login.c
index b6cda6f7..10e2df82 100644
--- a/src/ngircd/irc-login.c
+++ b/src/ngircd/irc-login.c
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
+#include <signal.h>
 #include <unistd.h>
 
 #include "ngircd.h"
diff --git a/src/ngircd/resolve.c b/src/ngircd/resolve.c
index d121b0a9..808ce53f 100644
--- a/src/ngircd/resolve.c
+++ b/src/ngircd/resolve.c
@@ -23,6 +23,7 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
+#include <signal.h>
 
 #ifdef IDENTAUTH
 #ifdef HAVE_IDENT_H