diff --git a/glamor/glamor.c b/glamor/glamor.c
index 4d6a8394e..59178b930 100644
--- a/glamor/glamor.c
+++ b/glamor/glamor.c
@@ -797,6 +797,7 @@ glamor_init(ScreenPtr screen, unsigned int flags)
         epoxy_gl_version() >= 30 ||
         epoxy_has_gl_extension("GL_NV_pack_subimage");
     glamor_priv->has_dual_blend =
+        glamor_priv->glsl_version >= 130 &&
         epoxy_has_gl_extension("GL_ARB_blend_func_extended");
     glamor_priv->has_clear_texture =
         epoxy_gl_version() >= 44 ||