diff --git a/esphome/components/esp8266/__init__.py b/esphome/components/esp8266/__init__.py
index 015caf92e..3c83400c1 100644
--- a/esphome/components/esp8266/__init__.py
+++ b/esphome/components/esp8266/__init__.py
@@ -166,6 +166,7 @@ async def to_code(config):
     cg.add_platformio_option("framework", "arduino")
     cg.add_build_flag("-DUSE_ARDUINO")
     cg.add_build_flag("-DUSE_ESP8266_FRAMEWORK_ARDUINO")
+    cg.add_build_flag("-Wno-nonnull-compare")
     cg.add_platformio_option("platform", conf[CONF_PLATFORM_VERSION])
     cg.add_platformio_option(
         "platform_packages",
diff --git a/platformio.ini b/platformio.ini
index ba232033a..8775b2815 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -94,6 +94,7 @@ lib_deps =
     DNSServer                             ; captive_portal (Arduino built-in)
 build_flags =
     ${common:arduino.build_flags}
+    -Wno-nonnull-compare
     -DUSE_ESP8266
     -DUSE_ESP8266_FRAMEWORK_ARDUINO
 extra_scripts = post:esphome/components/esp8266/post_build.py.script