diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index b386fde6..46c1d0a1 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -33,6 +33,7 @@
 #include <sys/socket.h>
 #include <fnmatch.h>
 #include <poll.h>
+#include <signal.h>
 
 /* libarchive */
 #include <archive.h>
diff --git a/src/pacman/conf.c b/src/pacman/conf.c
index a4f2ba35..cde96716 100644
--- a/src/pacman/conf.c
+++ b/src/pacman/conf.c
@@ -31,6 +31,7 @@
 #include <sys/utsname.h> /* uname */
 #include <sys/wait.h>
 #include <unistd.h>
+#include <signal.h>
 
 /* pacman */
 #include "conf.h"