diff --git a/src/Text/Pandoc/Writers/ANSI.hs b/src/Text/Pandoc/Writers/ANSI.hs
index e20713f61..ddcc30c46 100644
--- a/src/Text/Pandoc/Writers/ANSI.hs
+++ b/src/Text/Pandoc/Writers/ANSI.hs
@@ -190,7 +190,12 @@ blockToANSI opts (CodeBlock attr str) = do
 
 blockToANSI opts (BlockQuote blocks) = do
   contents <- withFewerColumns 2 $ blockListToANSI opts blocks
-  return ( D.prefixed "│ " contents $$ D.blankline)
+  -- D.cr ensures we start the blockquote on its own line: without it,
+  -- a blockquote that begins mid-line (e.g. as the first block of a
+  -- list item, sharing a line with the item's marker) would have its
+  -- prefix omitted on the first line, since D.prefixed only prefixes
+  -- lines that begin at column 0.
+  return ( D.cr <> D.prefixed "│ " contents $$ D.blankline)
 
 blockToANSI opts (Table _ (Caption _ caption) colSpecs (TableHead _ thead) tbody (TableFoot _ tfoot)) = do
   let captionInlines = blocksToInlines caption
diff --git a/test/ansi-test.ansi b/test/ansi-test.ansi
index 57147eacc..ae4f9398a 100644
--- a/test/ansi-test.ansi
+++ b/test/ansi-test.ansi
@@ -34,6 +34,13 @@ Text
 │
 │ │ Nested block quote
 
+Numbered list item beginning with a block quote (regression test for
+issue #11804, where the leading bar was dropped on the block quote’s
+first line because it shared a line with the list marker):
+
+1. 
+   │ List item block quote
+
 Multiline table with caption:
 
 Centered    Left       Right        Default aligned
diff --git a/test/ansi-test.txt b/test/ansi-test.txt
index 4e6f9800c..692b445b3 100644
--- a/test/ansi-test.txt
+++ b/test/ansi-test.txt
@@ -38,6 +38,12 @@ Text
 >
 > > Nested block quote
 
+Numbered list item beginning with a block quote (regression test for
+issue #11804, where the leading bar was dropped on the block quote's
+first line because it shared a line with the list marker):
+
+1.  > List item block quote
+
 Multiline table with caption:
 
 :  Here's the caption.