diff --git a/esphome/components/api/api_server.cpp b/esphome/components/api/api_server.cpp
index f25a9bc0e2..67a117e68f 100644
--- a/esphome/components/api/api_server.cpp
+++ b/esphome/components/api/api_server.cpp
@@ -28,11 +28,7 @@ static const char *const TAG = "api";
 // APIServer
 APIServer *global_api_server = nullptr;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
-APIServer::APIServer() {
-  global_api_server = this;
-  // Pre-allocate shared write buffer
-  shared_write_buffer_.reserve(64);
-}
+APIServer::APIServer() { global_api_server = this; }
 
 void APIServer::setup() {
   ControllerRegistry::register_controller(this);