diff --git a/Makefile b/Makefile
index d6a7d44..82d6b4e 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,7 @@ BUILD:=_build
 core:
 	dune build src/core/cbindings.exe.o
 	ar -rs $(BUILD)/liboboycore.a _build/default/src/core/cbindings.exe.o
+	scripts/invalidate_cpp.sh
 
 # check:
 # 	ocamlbuild -use-ocamlfind -I src -lflag -g test/test_bit.byte --
diff --git a/scripts/invalidate_cpp.sh b/scripts/invalidate_cpp.sh
new file mode 100755
index 0000000..592aca1
--- /dev/null
+++ b/scripts/invalidate_cpp.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+for dir in _build/qt/*; do
+	pushd $dir
+		cmake --build . --target clean
+	popd
+done