diff --git a/build/shared/lib/keywords.txt b/build/shared/lib/keywords.txt
index 22e1819c4db..b1802fecea1 100644
--- a/build/shared/lib/keywords.txt
+++ b/build/shared/lib/keywords.txt
@@ -73,6 +73,7 @@ protected	LITERAL1		RESERVED_WORD_2
 public	LITERAL1		RESERVED_WORD_2
 short	LITERAL1		RESERVED_WORD_2
 signed	LITERAL1		RESERVED_WORD_2
+size_t	LITERAL1		RESERVED_WORD_2
 static	LITERAL1	Static	RESERVED_WORD_2
 volatile	LITERAL1	Volatile	RESERVED_WORD_2
 String	LITERAL1	String	RESERVED_WORD_2