diff --git a/esphome/components/espnow/espnow.cpp b/esphome/components/espnow/espnow.cpp
index 12681ad2cc..b1cfe4decf 100644
--- a/esphome/components/espnow/espnow.cpp
+++ b/esphome/components/espnow/espnow.cpp
@@ -114,7 +114,7 @@ void ESPNowComponent::dump_config() {
            packet->content(5), packet->content(6), packet->content(7), packet->content(8), packet->content(9),
            packet->size());
 
-  ESP_LOGI(TAG, "test: A:%06x  R:%02x  C:%04x S:%d", packet->protocol_id(), packet->packet_id(), packet->crc(),
+  ESP_LOGI(TAG, "test: A:%06lx  R:%02x  C:%04x S:%d", packet->protocol_id(), packet->packet_id(), packet->crc(),
            packet->size());
   ESP_LOGI(TAG, "test: is_valid: %s",
            packet->is_valid() ? "Yes" : "No");  // ESP_LOGCONFIG(TAG, "  WiFi Channel: %n", WiFi.channel());
@@ -241,7 +241,7 @@ ESPNowDefaultProtocol *ESPNowComponent::get_default_protocol() {
 
 ESPNowProtocol *ESPNowComponent::get_protocol_(uint32_t protocol) {
   if (this->protocols_[protocol] == nullptr) {
-    ESP_LOGE(TAG, "Protocol for '0x%06x' is not registered", protocol);
+    ESP_LOGE(TAG, "Protocol for '0x%06lx' is not registered", protocol);
     return nullptr;
   }
   return this->protocols_[protocol];
diff --git a/esphome/components/espnow/espnow.h b/esphome/components/espnow/espnow.h
index 8fe15670a6..08567915db 100644
--- a/esphome/components/espnow/espnow.h
+++ b/esphome/components/espnow/espnow.h
@@ -49,7 +49,8 @@ struct ESPNowData {
   uint32_t timestamp{0};
   uint8_t size{0};
   uint8_t content[251]{0};
-};
+} __attribute__((packed));
+
 class ESPNowPacket {
  public:
   ESPNowPacket() {