diff --git a/repmgr-action-daemon.c b/repmgr-action-daemon.c
index 17c66c28..b97ec8b9 100644
--- a/repmgr-action-daemon.c
+++ b/repmgr-action-daemon.c
@@ -18,6 +18,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <signal.h>
 #include <sys/stat.h>			/* for stat() */
 
 #include "repmgr.h"
diff --git a/repmgr-client.c b/repmgr-client.c
index 83a4923d..dde5f332 100644
--- a/repmgr-client.c
+++ b/repmgr-client.c
@@ -54,6 +54,7 @@
 
 #include <unistd.h>
 #include <sys/stat.h>
+#include <signal.h>
 
 #include "repmgr.h"
 #include "compat.h"