diff --git a/lua/nvim-devdocs/transpiler.lua b/lua/nvim-devdocs/transpiler.lua
index b5d04e8..25d98c7 100644
--- a/lua/nvim-devdocs/transpiler.lua
+++ b/lua/nvim-devdocs/transpiler.lua
@@ -289,7 +289,7 @@ function transpiler:eval(node)
 
     if tag_name == "a" then
       result = string.format("[%s](%s)", result, attributes.href)
-    elseif tag_name == "img" and string.match(attributes.src, "^data:") then
+    elseif tag_name == "img" and string.match(attributes.src or "", "^data:") then
       result = string.format("![%s](%s)\n", attributes.alt, "data:inline_image")
     elseif tag_name == "img" then
       result = string.format("![%s](%s)\n", attributes.alt, attributes.src)