--- build/src/compiler/glsl/glsl_parser.h
+++ build/src/compiler/glsl/glsl_parser.h
@@ -143,7 +143,7 @@
 #endif
 #ifndef YYSTYPE_IS_DECLARED
 #define YYSTYPE_IS_DECLARED 1
-typedef union {
+union YYSTYPE {
    int n;
    int64_t n64;
    float real;
@@ -182,7 +182,8 @@
    } selection_rest_statement;
 
    const glsl_type *type;
-} YYSTYPE;
+};
+typedef union YYSTYPE YYSTYPE;
 #endif /* !YYSTYPE_IS_DECLARED */
 
 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
--- build/src/compiler/glsl/glsl_parser.cpp
+++ build/src/compiler/glsl/glsl_parser.cpp
@@ -212,7 +212,7 @@
 #ifndef YYSTYPE_IS_DECLARED
 #define YYSTYPE_IS_DECLARED 1
 #line 101 "../src/compiler/glsl/glsl_parser.yy"
-typedef union {
+union YYSTYPE {
    int n;
    int64_t n64;
    float real;
@@ -251,7 +251,8 @@
    } selection_rest_statement;
 
    const glsl_type *type;
-} YYSTYPE;
+};
+typedef union YYSTYPE YYSTYPE;
 #endif /* !YYSTYPE_IS_DECLARED */
 #line 257 "src/compiler/glsl/glsl_parser.cpp"