diff --git a/toolbox/Android.mk b/toolbox/Android.mk
index ff001a8..186a89f 100644
--- a/toolbox/Android.mk
+++ b/toolbox/Android.mk
@@ -60,7 +60,6 @@
     start \
     stop \
     top \
-    umount \
     uptime \
     watchprops \
 
diff --git a/toolbox/umount.c b/toolbox/umount.c
deleted file mode 100644
index 3e17396..0000000
--- a/toolbox/umount.c
+++ /dev/null
@@ -1,90 +0,0 @@
-
-#include <sys/mount.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <linux/loop.h>
-#include <errno.h>
-
-#define LOOPDEV_MAXLEN 64
-#define LOOP_MAJOR 7
-
-static int is_loop(char *dev)
-{
-    struct stat st;
-    int ret = 0;
-
-    if (stat(dev, &st) == 0) {
-        if (S_ISBLK(st.st_mode) && (major(st.st_rdev) == LOOP_MAJOR)) {
-            ret = 1;
-        }
-    }
-
-    return ret;
-}
-
-static int is_loop_mount(const char* path, char *loopdev)
-{
-    FILE* f;
-    int count;
-    char device[256];
-    char mount_path[256];
-    char rest[256];
-    int result = 0;
-    
-    f = fopen("/proc/mounts", "r");
-    if (!f) {
-        fprintf(stdout, "could not open /proc/mounts: %s\n", strerror(errno));
-        return -1;
-    }
-
-    do {
-        count = fscanf(f, "%255s %255s %255s\n", device, mount_path, rest);
-        if (count == 3) {
-            if (is_loop(device) && strcmp(path, mount_path) == 0) {
-                strlcpy(loopdev, device, LOOPDEV_MAXLEN);
-                result = 1;
-                break;
-            }
-        }
-    } while (count == 3);
-
-    fclose(f);
-    return result;
-}
-
-int umount_main(int argc, char *argv[])
-{
-    int loop, loop_fd;
-    char loopdev[LOOPDEV_MAXLEN];
-
-    if(argc != 2) {
-        fprintf(stderr,"umount <path>\n");
-        return 1;
-    }
-
-    loop = is_loop_mount(argv[1], loopdev);
-    if (umount(argv[1])) {
-        fprintf(stderr, "failed: %s\n", strerror(errno));
-        return 1;
-    }
-
-    if (loop) {
-        // free the loop device
-        loop_fd = open(loopdev, O_RDONLY);
-        if (loop_fd < 0) {
-            fprintf(stderr, "open loop device failed: %s\n", strerror(errno));
-            return 1;
-        }
-        if (ioctl(loop_fd, LOOP_CLR_FD, 0) < 0) {
-            fprintf(stderr, "ioctl LOOP_CLR_FD failed: %s\n", strerror(errno));
-            return 1;
-        }
-
-        close(loop_fd);
-    }
-
-    return 0;
-}