diff --git a/libraries/SPI/SPI.h b/libraries/SPI/SPI.h
index e8fb8a3902..40ed0d9441 100644
--- a/libraries/SPI/SPI.h
+++ b/libraries/SPI/SPI.h
@@ -24,7 +24,7 @@
 #include <Arduino.h>
 #include <stdlib.h>
 
-#define SPI_HAS_TRANSACTION
+#define SPI_HAS_TRANSACTION 1
 
 // This defines are not representing the real Divider of the ESP8266
 // the Defines match to an AVR Arduino on 16MHz for better compatibility