diff --git a/lldb/bindings/python/CMakeLists.txt b/lldb/bindings/python/CMakeLists.txt
index baad7e8f0eba7..2b14ee339d0de 100644
--- a/lldb/bindings/python/CMakeLists.txt
+++ b/lldb/bindings/python/CMakeLists.txt
@@ -10,6 +10,7 @@ add_custom_command(
       -c++
       -shadow
       -python
+      -py3
       -threads
       -outdir ${CMAKE_CURRENT_BINARY_DIR}
       -o ${CMAKE_CURRENT_BINARY_DIR}/LLDBWrapPython.cpp