diff --git a/cmd/zed/zed_file.c b/cmd/zed/zed_file.c
index 4437892e9..c7b0d00b6 100644
--- a/cmd/zed/zed_file.c
+++ b/cmd/zed/zed_file.c
@@ -12,6 +12,7 @@
  * You may not use this file except in compliance with the license.
  */
 
+#include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -160,6 +161,13 @@ zed_file_is_locked(int fd)
 	return (lock.l_pid);
 }
 
+
+#if __APPLE__
+#define	PROC_SELF_FD "/dev/fd"
+#else /* Linux-compatible layout */
+#define	PROC_SELF_FD "/proc/self/fd"
+#endif
+
 /*
  * Close all open file descriptors greater than or equal to [lowfd].
  * Any errors encountered while closing file descriptors are ignored.
@@ -167,17 +175,23 @@ zed_file_is_locked(int fd)
 void
 zed_file_close_from(int lowfd)
 {
-	const int maxfd_def = 256;
-	int errno_bak;
+	static const int maxfd_def = 256;
+	int errno_bak = errno;
 	struct rlimit rl;
-	int maxfd;
+	int maxfd = 0;
 	int fd;
+	DIR *fddir;
+	struct dirent *fdent;
 
-	errno_bak = errno;
-
-	if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
-		maxfd = maxfd_def;
-	} else if (rl.rlim_max == RLIM_INFINITY) {
+	if ((fddir = opendir(PROC_SELF_FD)) != NULL) {
+		while ((fdent = readdir(fddir)) != NULL) {
+			fd = atoi(fdent->d_name);
+			if (fd > maxfd && fd != dirfd(fddir))
+				maxfd = fd;
+		}
+		(void) closedir(fddir);
+	} else if (getrlimit(RLIMIT_NOFILE, &rl) < 0 ||
+	    rl.rlim_max == RLIM_INFINITY) {
 		maxfd = maxfd_def;
 	} else {
 		maxfd = rl.rlim_max;