diff --git a/STM32F1/libraries/Wire/keywords.txt b/STM32F1/libraries/Wire/keywords.txt
index 3fddb6f..4234cc5 100644
--- a/STM32F1/libraries/Wire/keywords.txt
+++ b/STM32F1/libraries/Wire/keywords.txt
@@ -14,4 +14,5 @@ SoftWire	KEYWORD1
 # Constants (LITERAL1)
 #######################################
 SOFT_STANDARD	LITERAL1
-SOFT_FAST		LITERAL1
\ No newline at end of file
+SOFT_FAST	LITERAL1
+I2C_FAST_MODE	LITERAL1
\ No newline at end of file