diff --git a/src/glsl/builtin_function.cpp b/src/glsl/builtin_function.cpp
index c6d1fc8f2a5..0202adc319d 100644
--- a/src/glsl/builtin_function.cpp
+++ b/src/glsl/builtin_function.cpp
@@ -37,6 +37,8 @@ read_builtins(GLenum target, const char *protos, const char **functions, unsigne
 {
    struct gl_context fakeCtx;
    fakeCtx.API = API_OPENGL;
+   fakeCtx.Const.GLSLVersion = 130;
+   fakeCtx.Extensions.ARB_ES2_compatibility = true;
    gl_shader *sh = _mesa_new_shader(NULL, 0, target);
    struct _mesa_glsl_parse_state *st =
       new(sh) _mesa_glsl_parse_state(&fakeCtx, target, sh);