diff -up cronie-1.4.11/src/misc.c.ddd cronie-1.4.11/src/misc.c
--- cronie-1.4.11/src/misc.c.ddd	2013-07-18 14:27:08.000000000 +0200
+++ cronie-1.4.11/src/misc.c	2013-08-30 13:51:22.227040980 +0200
@@ -75,7 +75,9 @@ static int LogFD = ERR;
 static int syslog_open = FALSE;
 #endif
 
-#if defined(HAVE_FCNTL) && defined(F_SETLK)
+#if defined(HAVE_FLOCK)
+# define trylock_file(fd)      flock((fd), LOCK_EX|LOCK_NB)
+#elif defined(HAVE_FCNTL) && defined(F_SETLK)
 static int trylock_file(int fd) {
 	struct flock fl;
 
@@ -89,8 +91,6 @@ static int trylock_file(int fd) {
 }
 #elif defined(HAVE_LOCKF)
 # define trylock_file(fd)      lockf((fd), F_TLOCK, 0)
-#elif defined(HAVE_FLOCK)
-# define trylock_file(fd)      flock((fd), LOCK_EX|LOCK_NB)
 #endif
 
 /*
@@ -346,6 +346,14 @@ void acquire_daemonlock(int closeflag) {
 		(void) fcntl(fd, F_SETFD, 1);
 	}
 
+#if !defined(HAVE_FLOCK)
+	else {
+		/* Racy but better than nothing, just hope the parent exits */
+		sleep(0);
+		trylock_file(fd);
+	}
+#endif
+
 	sprintf(buf, "%ld\n", (long) pid);
 	(void) lseek(fd, (off_t) 0, SEEK_SET);
 	len = strlen(buf);