--- /dev/null
+#ifndef MSP_GL_PRIMITIVETYPE_BACKEND_H_
+#define MSP_GL_PRIMITIVETYPE_BACKEND_H_
+
+#ifndef MSP_GL_PRIMITIVETYPE_H_
+#error "primitivetype_backend.h requires primitivetype.h"
+#endif
+
+namespace Msp {
+namespace GL {
+
+unsigned get_vulkan_primitive_type(PrimitiveType);
+
+} // namespace GL
+} // namespace Msp
+
+#endif