diff --git a/libraries/gpu-gles/src/gpu/gles/GLESBackend.h b/libraries/gpu-gles/src/gpu/gles/GLESBackend.h
index 8ecdb2494b..aaa1be5892 100644
--- a/libraries/gpu-gles/src/gpu/gles/GLESBackend.h
+++ b/libraries/gpu-gles/src/gpu/gles/GLESBackend.h
@@ -28,6 +28,10 @@ class GLESBackend : public GLBackend {
 
 public:
     static const GLint RESOURCE_TRANSFER_TEX_UNIT { 32 };
+    static const GLint RESOURCE_TRANSFER_EXTRA_TEX_UNIT { 33 };
+    static const GLint RESOURCE_BUFFER_TEXBUF_TEX_UNIT { 34 };
+    static const GLint RESOURCE_BUFFER_SLOT0_TEX_UNIT { 35 };
+
     explicit GLESBackend(bool syncCache) : Parent(syncCache) {}
     GLESBackend() : Parent() {}
     virtual ~GLESBackend() {