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-rw-r--r--src/libsyntax/parse/token.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index 53c1ce1c7f5..0d139b101d8 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -427,6 +427,7 @@ fn strict_keyword_table() -> HashMap<~str, ()> {
         ~"if", ~"impl",
         ~"let", ~"log", ~"loop",
         ~"match", ~"mod", ~"move", ~"mut",
+        ~"once",
         ~"priv", ~"pub", ~"pure",
         ~"ref", ~"return",
         ~"struct",