diff --git a/glslang/MachineIndependent/glslang.y b/glslang/MachineIndependent/glslang.y
index 3ee28c32..d076a410 100644
--- a/glslang/MachineIndependent/glslang.y
+++ b/glslang/MachineIndependent/glslang.y
@@ -106,7 +106,7 @@ extern int yylex(YYSTYPE*, TParseContext&);
 
 %parse-param {glslang::TParseContext* pParseContext}
 %lex-param {parseContext}
-%pure_parser  // enable thread safety
+%pure-parser  // enable thread safety
 %expect 1     // One shift reduce conflict because of if | else
 
 %token <lex> ATTRIBUTE VARYING