diff --git a/src/library/plugin/plugin.c b/src/library/plugin/plugin.c
index 866a898..e7c3c90 100644
--- a/src/library/plugin/plugin.c
+++ b/src/library/plugin/plugin.c
@@ -1427,6 +1427,7 @@ uint8_t _bolt_plugin_add(const char* path, struct Plugin* plugin) {
     API_ADD_SUB(plugin->state, writeinteger, buffer)
     API_ADD_SUB(plugin->state, writenumber, buffer)
     API_ADD_SUB(plugin->state, writestring, buffer)
+    API_ADD_SUB(plugin->state, writebuffer, buffer)
     lua_settable(plugin->state, -3);
     lua_pushliteral(plugin->state, "__gc");
     lua_pushcfunction(plugin->state, buffer_gc);
@@ -2890,3 +2891,11 @@ static int api_buffer_writestring(lua_State* state) {
     memcpy((uint8_t*)buffer->data + offset, data, size);
     return 0;
 }
+
+static int api_buffer_writebuffer(lua_State* state) {
+    const struct FixedBuffer* buffer = require_self_userdata(state, "writebuffer");
+    const struct FixedBuffer* source = require_userdata(state, 2, "writebuffer");
+    const long offset = luaL_checklong(state, 3);
+    memcpy((uint8_t*)buffer->data + offset, source->data, source->size);
+    return 0;
+}
diff --git a/src/library/plugin/plugin_api.h b/src/library/plugin/plugin_api.h
index 8e8b0f8..66df747 100644
--- a/src/library/plugin/plugin_api.h
+++ b/src/library/plugin/plugin_api.h
@@ -882,3 +882,8 @@ static int api_buffer_writenumber(lua_State*);
 /// Writes a string into the buffer. The first parameter is the string and the second is the offset
 /// into the buffer where the string should begin.
 static int api_buffer_writestring(lua_State*);
+
+/// [-3, +0, -]
+/// Writes the contents of another buffer into this buffer. The first parameter is the buffer to be
+/// copied from, and the second is the offset in this buffer where it should be copied to.
+static int api_buffer_writebuffer(lua_State*);