diff --git a/lua/codemp/workspace.lua b/lua/codemp/workspace.lua
index 27b89f1..84ce94d 100644
--- a/lua/codemp/workspace.lua
+++ b/lua/codemp/workspace.lua
@@ -100,6 +100,10 @@ local function register_cursor_handler(controller)
 				local buffer_id = buffers.map_rev[event.buffer]
 				if buffer_id ~= nil then
 					local hi = user_hl[event.user].hi
+					if event.start[1] == event.finish[1] and event.start[2] == event.finish[2] then
+						-- vim can't draw 0-width cursors, so we always expand them to at least 1 width
+						event.finish[2] = event.finish[2] + 1
+					end
 					user_hl[event.user].mark = vim.api.nvim_buf_set_extmark(
 						buffer_id,
 						user_hl[event.user].ns,