diff --git a/lib/PrintAsClang/CMakeLists.txt b/lib/PrintAsClang/CMakeLists.txt
index 4449491295d..74306f9ad18 100644
--- a/lib/PrintAsClang/CMakeLists.txt
+++ b/lib/PrintAsClang/CMakeLists.txt
@@ -1,6 +1,7 @@
 set(datafiles
     _SwiftCxxInteroperability.h
     _SwiftStdlibCxxOverlay.h
+    experimental-interoperability-version.json
 )
 
 set(SWIFTLIB_DIR
diff --git a/lib/PrintAsClang/experimental-interoperability-version.json b/lib/PrintAsClang/experimental-interoperability-version.json
new file mode 100644
index 00000000000..d00491fd7e5
--- /dev/null
+++ b/lib/PrintAsClang/experimental-interoperability-version.json
@@ -0,0 +1 @@
+1