diff --git a/R/hooks-asciidoc.R b/R/hooks-asciidoc.R
index 4d888b55d4..08e414ce0b 100644
--- a/R/hooks-asciidoc.R
+++ b/R/hooks-asciidoc.R
@@ -37,7 +37,6 @@ render_asciidoc = function() {
     sprintf('+%s+', x)
   }
   hook.chunk = function(x, options) {
-    x = gsub("/{2,}", "", x)
     if (is.null(s = options$indent)) return(x)
     line_prompt(x, prompt = s, continue = s)
   }
diff --git a/R/pattern.R b/R/pattern.R
index 41c3d6c987..281bef3edd 100644
--- a/R/pattern.R
+++ b/R/pattern.R
@@ -43,7 +43,7 @@ all_patterns = list(
                inline.code = ":r:`([^`]+)`"),
 
   `asciidoc` = list(chunk.begin = '^/{2}\\s*begin\\.rcode$',
-                    chunk.end = '^/{2}\\s*end\\.rcode$',
+                    chunk.end = '^/{2}\\s*end\\.rcode$', chunk.code = '^/+',
                     ref.chunk = '^\\s*<<(.+)>>\\s*$',
                     inline.code = '`r +([^`\n]+)\\s*`',
                     inline.comment = '^//.*',