diff --git a/docs/guides.md b/docs/guides.md
index d814f84b2..b13134a84 100644
--- a/docs/guides.md
+++ b/docs/guides.md
@@ -257,7 +257,7 @@ Since `/` is read-only on system-as-root devices, Magisk provides an overlay sys
 
 Overlay files shall be placed in the `overlay.d` folder in boot image ramdisk, and they follow these rules:
 
-1. All `*.rc` files in `overlay.d` will be read and concatenated **AFTER** `init.rc`
+1. Each `*.rc` file (except for `init.rc`) in `overlay.d` will be read and concatenated **AFTER** `init.rc` if it does not exist in the root directory, otherwise it will **REPLACE** the existing one.
 2. Existing files can be replaced by files located at the same relative path
 3. Files that correspond to a non-existing file will be ignored
 
diff --git a/native/src/init/rootdir.cpp b/native/src/init/rootdir.cpp
index 65e3e0201..b7c5fa42d 100644
--- a/native/src/init/rootdir.cpp
+++ b/native/src/init/rootdir.cpp
@@ -68,8 +68,18 @@ static void load_overlay_rc(const char *overlay) {
     int dfd = dirfd(dir.get());
     // Do not allow overwrite init.rc
     unlinkat(dfd, "init.rc", 0);
+
+    // '/' + name + '\0'
+    char buf[NAME_MAX + 2];
+    buf[0] = '/';
     for (dirent *entry; (entry = xreaddir(dir.get()));) {
-        if (str_ends(entry->d_name, ".rc")) {
+        if (!str_ends(entry->d_name, ".rc")) {
+            continue;
+        }
+        strscpy(buf + 1, entry->d_name, sizeof(buf) - 1);
+        if (access(buf, F_OK) == 0) {
+            LOGD("Replace rc script [%s]\n", entry->d_name);
+        } else {
             LOGD("Found rc script [%s]\n", entry->d_name);
             int rc = xopenat(dfd, entry->d_name, O_RDONLY | O_CLOEXEC);
             rc_list.push_back(full_read(rc));