diff --git a/src/script.c b/src/script.c
index fced3ac..acd4468 100644
--- a/src/script.c
+++ b/src/script.c
@@ -35,6 +35,7 @@ static pid_t script = 0;
 
 static void handler(int signo)
 {
+	int save_errno = errno;
 	int status;
 	pid_t pid = 1;
 
@@ -55,6 +56,7 @@ static void handler(int signo)
 				smclog(LOG_WARNING, "Script %s returned error: %d", exec, status);
 		}
 	}
+	errno = save_errno;
 }
 
 int script_init(char *script)
diff --git a/src/timer.c b/src/timer.c
index 56e0d27..b0d8e48 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -164,9 +164,12 @@ static void run(int sd, void *arg)
 /* write to pipe to create an event for select() on SIGALRM */
 static void handler(int signo)
 {
+	int save_errno = errno;
+
 	(void)signo;
 	if (write(timerfd[1], "!", 1) < 0)
 		smclog(LOG_DEBUG, "Failed write(pipe): %s", strerror(errno));
+	errno = save_errno;
 }
 
 /*