diff --git a/src/HomieDevice.cpp b/src/HomieDevice.cpp
index 9ca99cb..43e2169 100644
--- a/src/HomieDevice.cpp
+++ b/src/HomieDevice.cpp
@@ -305,9 +305,13 @@ void HomieDevice::Loop()
 
 
 	static uint32_t ulFreeHeap=0xFFFFFFF;
-	static uint32_t ulFreeHeapContig=0xFFFFFFF;
 #if defined(ARDUINO_ARCH_ESP8266)
-	static uint8_t uHeapFrag=0;	
+	static uint8_t uHeapFrag=0;
+	#if ARDUINO_ESP8266_GIT_DESC < 3
+		static uint16_t ulFreeHeapContig=0xFFFF;
+	#else
+		static uint32_t ulFreeHeapContig=0xFFFFFFF;
+	#endif
 #endif
 
 	if(bEvenSecond)