diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 35e08749df7..a94236b5228 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -168,6 +168,7 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
+   ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
    ctx->Extensions.EXT_fog_coord = GL_TRUE;
    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;