diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -62,7 +62,7 @@ DIFF_TYPE_JSON = 'json'
 
 PREPARSE_PATTERNS = {
     r'>>(\d+)': r'[post]\1[/post]',  # Reflink ">>123"
-    r'^>(.+)': r'[quote]\1[/quote]',  # Quote ">text"
+    r'^(?<!>)>(.+)': r'[quote]\1[/quote]',  # Quote ">text"
     r'^//(.+)': r'[comment]\1[/comment]',  # Comment "//text"
 }