diff --git a/markdown.nanorc b/markdown.nanorc
index 5a1755c..5c513bd 100644
--- a/markdown.nanorc
+++ b/markdown.nanorc
@@ -9,7 +9,7 @@ color brightgreen "(^|[[:space:]])(__[^ ][^_]*__|\*\*[^ ][^*]*\*\*)"
 color brightmagenta  "^=====*$|^-----*$|^#{1,6}.*"
 color blue   "^[[:space:]]*[\*+-] |^[[:space:]]*[0-9]+\. "
 color black    "^[[:space:]]+"
-color magenta   "\(([CcRr]|[Tt][Mm])\)" "\.{3}" "(^|[[:space:]])\-\-($$
+color magenta   "\(([CcRr]|[Tt][Mm])\)" "\.{3}" "(^|[[:space:]])\-\-($$)"
 color brightyellow "\!?\[[^]]*\]([[:space:]]*\[[^]]*\]|\(.*\))?"
 color brightyellow "^\[.*\]:[[:space:]]*[^"]*"
 color yellow   "`[^`]*`|^ {4}[^-+*].*"