diff --git a/indra/cmake/BuildVersion.cmake b/indra/cmake/BuildVersion.cmake
index 60a519c9af..80cdd99ac2 100644
--- a/indra/cmake/BuildVersion.cmake
+++ b/indra/cmake/BuildVersion.cmake
@@ -5,7 +5,7 @@ include(Python)
 macro (build_version _target)
   execute_process(
       COMMAND ${PYTHON_EXECUTABLE} ${SCRIPTS_DIR}/build_version.py
-        llversion${_target}.h ${LLCOMMON_INCLUDE_DIRS}
+        llversion${_target}.cpp ${LLCOMMON_INCLUDE_DIRS}
       OUTPUT_VARIABLE ${_target}_VERSION
       OUTPUT_STRIP_TRAILING_WHITESPACE
       )