diff --git a/samples/CMakeLists.txt b/samples/CMakeLists.txt
index 70e263c3e..663012255 100644
--- a/samples/CMakeLists.txt
+++ b/samples/CMakeLists.txt
@@ -23,7 +23,7 @@ set (SAMPLE_FILES
   WSPR/150426_0918.wav
   )
 
-set (contents_file_name contents_${WSJTX_VERSION_MAJOR}.${WSJTX_VERSION_MINOR}.json)
+set (contents_file_name contents_${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.json)
 set (contents_file ${CMAKE_CURRENT_BINARY_DIR}/${contents_file_name})
 set (web_tree ${CMAKE_CURRENT_BINARY_DIR}/web)
 set_source_files_properties (${contents_file} PROPERTIES GENERATED ON)