diff --git a/lib/babycode.lua b/lib/babycode.lua
index dca9962..c6e3f50 100644
--- a/lib/babycode.lua
+++ b/lib/babycode.lua
@@ -71,7 +71,7 @@ local tags = {
   b = "<strong>$S</strong>",
   i = "<em>$S</em>",
   s = "<del>$S</del>",
-  img = "<div class=\"post-img-container\"><img class=\"block-img\" src=$A alt=%S></div>",
+  img = "<div class=\"post-img-container\"><img class=\"block-img\" src=$A alt=$S></div>",
   url = "<a href=\"$A\">$S</a>",
   quote = "<blockquote>$S</blockquote>",
   code = function(children)