diff --git a/Fat.cpp b/Fat.cpp
index c967a90..cd4ea5f 100644
--- a/Fat.cpp
+++ b/Fat.cpp
@@ -171,7 +171,7 @@
 
 int Fat::format(const char *fsPath, unsigned int numSectors, bool wipe) {
     int fd;
-    const char *args[10];
+    const char *args[11];
     int rc;
     int status;
 
@@ -185,20 +185,21 @@
     args[3] = "-O";
     args[4] = "android";
     args[5] = "-c";
-    args[6] = "8";
+    args[6] = "64";
+    args[7] = "-A";
 
     if (numSectors) {
         char tmp[32];
         snprintf(tmp, sizeof(tmp), "%u", numSectors);
         const char *size = tmp;
-        args[7] = "-s";
-        args[8] = size;
-        args[9] = fsPath;
+        args[8] = "-s";
+        args[9] = size;
+        args[10] = fsPath;
         rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status,
                 false, true);
     } else {
-        args[7] = fsPath;
-        rc = android_fork_execvp(8, (char **)args, &status, false,
+        args[8] = fsPath;
+        rc = android_fork_execvp(9, (char **)args, &status, false,
                 true);
     }