diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -3,6 +3,7 @@
 project(bitcoin-test)
 
 # Process json files.
+add_subdirectory(data)
 find_program(PYTHON python)
 function(gen_json_header NAME)
 	set(HEADERS "")
diff --git a/src/test/data/CMakeLists.txt b/src/test/data/CMakeLists.txt
new file mode 100644
--- /dev/null
+++ b/src/test/data/CMakeLists.txt
@@ -0,0 +1,4 @@
+# Copyright (c) 2018 The Bitcoin developers
+
+# Data files only
+