diff --git a/lldb/source/Expression/FunctionCaller.cpp b/lldb/source/Expression/FunctionCaller.cpp
index 08dbb712c3ac..622d80175363 100644
--- a/lldb/source/Expression/FunctionCaller.cpp
+++ b/lldb/source/Expression/FunctionCaller.cpp
@@ -48,7 +48,8 @@ FunctionCaller::FunctionCaller(ExecutionContextScope &exe_scope,
       m_function_return_type(return_type),
       m_wrapper_function_name("__lldb_caller_function"),
       m_wrapper_struct_name("__lldb_caller_struct"), m_wrapper_args_addrs(),
-      m_arg_values(arg_value_list), m_compiled(false), m_JITted(false) {
+      m_struct_valid(false), m_arg_values(arg_value_list), m_compiled(false),
+      m_JITted(false) {
   m_jit_process_wp = lldb::ProcessWP(exe_scope.CalculateProcess());
   // Can't make a FunctionCaller without a process.
   assert(m_jit_process_wp.lock());