diff --git a/data/filedefs/filetypes.markdown b/data/filedefs/filetypes.markdown
index 4542a616e5..0dd46e97db 100644
--- a/data/filedefs/filetypes.markdown
+++ b/data/filedefs/filetypes.markdown
@@ -30,3 +30,6 @@ mime_type=text/x-markdown
 symbol_list_sort_mode=1
 
 
+[lexer_properties]
+# apply heading style to entire line
+lexer.markdown.header.eolfill=1