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-rw-r--r--src/mesa/state_tracker/st_extensions.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 32348ef73d8..d0194296793 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -615,6 +615,7 @@ void st_init_extensions(struct st_context *st)
ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
+ ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
} else {
/* Optional integer support for GLSL 1.2. */
if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,