diff --git a/glhr.cpp b/glhr.cpp
index da4fe0dc..e23d454f 100644
--- a/glhr.cpp
+++ b/glhr.cpp
@@ -485,6 +485,7 @@ EX void full_enable(shared_ptr<GLprogram> p) {
   auto& cur = current_glprogram;
   flagtype oldflags = cur ? cur->shader_flags : 0;
   if(p == cur) return;
+  if(!vid.usingGL) return;
   cur = p;
   GLERR("pre_switch_mode");
   WITHSHADER({
diff --git a/shaders.cpp b/shaders.cpp
index 301794e1..cbe6d2f6 100644
--- a/shaders.cpp
+++ b/shaders.cpp
@@ -286,7 +286,7 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
   vsh += varying;
   vsh += vmain;
   
-  if(glhr::noshaders) fsh = vsh = "";
+  if(glhr::noshaders || !vid.usingGL) fsh = vsh = "";
   
   string both = fsh + "*" + vsh + "*" + its(shader_flags);
   if(compiled_programs.count(both))