diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b5af30..6836651 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -668,6 +668,10 @@ install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
         FILES_MATCHING
         PATTERN "*.h")
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+        FILES_MATCHING PATTERN "*.proto")
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+        FILES_MATCHING PATTERN "*.proto3")
 
 configure_file(
   ${PROJECT_SOURCE_DIR}/cmake/ONNXConfigVersion.cmake.in