diff --git a/lib/langchain/llm/google_vertex_ai.rb b/lib/langchain/llm/google_vertex_ai.rb
index e6a42a745..d1b3b5200 100644
--- a/lib/langchain/llm/google_vertex_ai.rb
+++ b/lib/langchain/llm/google_vertex_ai.rb
@@ -89,7 +89,7 @@ def chat(params = {})
       params[:system] = {parts: [{text: params[:system]}]} if params[:system]
       params[:tools] = {function_declarations: params[:tools]} if params[:tools]
       # This throws an error when tool_choice is passed
-      params[:tool_choice] = {function_calling_config: {mode: params[:tool_choice].upcase}} if params[:tool_choice]
+      # params[:tool_choice] = {function_calling_config: {mode: params[:tool_choice].upcase}} if params[:tool_choice]
 
       raise ArgumentError.new("messages argument is required") if Array(params[:messages]).empty?