diff --git a/README b/README
index d0d0ddd6b..884cb1f94 100644
--- a/README
+++ b/README
@@ -3378,8 +3378,7 @@ variants are supported:
     `shortcut_reference_links`.
 
 `markdown_github` (GitHub-Flavored Markdown)
-:   `pipe_tables`, `raw_html`, `tex_math_single_backslash`,
-    `fenced_code_blocks`, `auto_identifiers`,
+:   `pipe_tables`, `raw_html`, `fenced_code_blocks`, `auto_identifiers`,
     `ascii_identifiers`, `backtick_code_blocks`, `autolink_bare_uris`,
     `intraword_underscores`, `strikeout`, `hard_line_breaks`, `emoji`,
     `shortcut_reference_links`.
diff --git a/src/Text/Pandoc/Options.hs b/src/Text/Pandoc/Options.hs
index 7dd47cd59..333f499fb 100644
--- a/src/Text/Pandoc/Options.hs
+++ b/src/Text/Pandoc/Options.hs
@@ -202,7 +202,6 @@ githubMarkdownExtensions :: Set Extension
 githubMarkdownExtensions = Set.fromList
   [ Ext_pipe_tables
   , Ext_raw_html
-  , Ext_tex_math_single_backslash
   , Ext_fenced_code_blocks
   , Ext_auto_identifiers
   , Ext_ascii_identifiers