diff --git a/src/subParsers/encodeBackslashEscapes.js b/src/subParsers/encodeBackslashEscapes.js
index 7909ed90b..1c0876d19 100644
--- a/src/subParsers/encodeBackslashEscapes.js
+++ b/src/subParsers/encodeBackslashEscapes.js
@@ -14,7 +14,7 @@ showdown.subParser('encodeBackslashEscapes', function (text, options, globals) {
   text = globals.converter._dispatch('encodeBackslashEscapes.before', text, options, globals);
 
   text = text.replace(/\\(\\)/g, showdown.helper.escapeCharactersCallback);
-  text = text.replace(/\\([`*_{}\[\]()>#+.!~=|-])/g, showdown.helper.escapeCharactersCallback);
+  text = text.replace(/\\([`*_{}\[\]()>#+.!~=|:-])/g, showdown.helper.escapeCharactersCallback);
 
   text = globals.converter._dispatch('encodeBackslashEscapes.after', text, options, globals);
   return text;
diff --git a/test/issues/#510.specific-string-gets-removed-from-text.html b/test/issues/#510.specific-string-gets-removed-from-text.html
new file mode 100644
index 000000000..a4657f157
--- /dev/null
+++ b/test/issues/#510.specific-string-gets-removed-from-text.html
@@ -0,0 +1,2 @@
+<p>[^1]:a</p>
+<p>[^1]:a</p>
diff --git a/test/issues/#510.specific-string-gets-removed-from-text.md b/test/issues/#510.specific-string-gets-removed-from-text.md
new file mode 100644
index 000000000..0abb73d92
--- /dev/null
+++ b/test/issues/#510.specific-string-gets-removed-from-text.md
@@ -0,0 +1,3 @@
+\[^1]:a
+
+[^1]\:a