diff --git a/apps/openmw/mwrender/transparentpass.cpp b/apps/openmw/mwrender/transparentpass.cpp
index eee7d72ecd..f058256087 100644
--- a/apps/openmw/mwrender/transparentpass.cpp
+++ b/apps/openmw/mwrender/transparentpass.cpp
@@ -80,6 +80,9 @@ namespace MWRender
             else
             {
                 opaqueFbo->apply(state, osg::FrameBufferObject::DRAW_FRAMEBUFFER);
+                state.glDrawBuffer(GL_NONE);
+                state.glReadBuffer(GL_NONE);
+
                 ext->glBlitFramebuffer(0, 0, tex->getTextureWidth(), tex->getTextureHeight(), 0, 0, tex->getTextureWidth(), tex->getTextureHeight(), GL_DEPTH_BUFFER_BIT, GL_NEAREST);
             }
 
@@ -92,6 +95,8 @@ namespace MWRender
                 return;
 
             opaqueFbo->apply(state, osg::FrameBufferObject::DRAW_FRAMEBUFFER);
+            state.glDrawBuffer(GL_NONE);
+            state.glReadBuffer(GL_NONE);
 
             // draw transparent post-pass to populate a postprocess friendly depth texture with alpha-clipped geometry