diff --git a/sdbuild/boot/meta-pynq/recipes-apps/pynq-cpp/pynq-cpp.bb b/sdbuild/boot/meta-pynq/recipes-apps/pynq-cpp/pynq-cpp.bb
index e3f86419c..408a26f85 100644
--- a/sdbuild/boot/meta-pynq/recipes-apps/pynq-cpp/pynq-cpp.bb
+++ b/sdbuild/boot/meta-pynq/recipes-apps/pynq-cpp/pynq-cpp.bb
@@ -16,6 +16,7 @@ SRC_URI = "file://cpp/CMakeLists.txt \
            file://cpp/gpio.cc \
            file://cpp/gpio.h \
            file://protos/buffer.proto \
+           file://protos/gpio.proto \
            file://protos/mmio.proto \
            file://protos/remote_device.proto \
            file://cmake/common.cmake \