diff --git a/lua/gemini/completion.lua b/lua/gemini/completion.lua
index 5fe6ba9..b7cfcee 100644
--- a/lua/gemini/completion.lua
+++ b/lua/gemini/completion.lua
@@ -21,6 +21,10 @@ end
 local function show_suggestion(suggestion, start_col)
     clear_suggestion()
     
+    -- Only use first line of suggestion
+    suggestion = suggestion:match("^[^\n]*")
+    if suggestion == "" then return end
+    
     local line = vim.api.nvim_win_get_cursor(0)[1] - 1
     current_suggestion.text = suggestion
     current_suggestion.start_col = start_col