diff --git a/src/mathed/math_cursor.C b/src/mathed/math_cursor.C
index c205450783..eeb7dfb8c6 100644
--- a/src/mathed/math_cursor.C
+++ b/src/mathed/math_cursor.C
@@ -1284,14 +1284,14 @@ void MathCursor::interpret(string const & s)
 		return;
 	}
 
-	if (lastcode_ != LM_TC_TEX && strchr("#$%{|}", c)) {
+	if (lastcode_ != LM_TC_TEX && strchr("#$%{}", c)) {
 		insert(new MathSpecialCharInset(c));	
 		return;
 	}
 
 	if (lastcode_ == LM_TC_TEX) {
 		if (macroName().empty()) {
-			if (strchr("#$%{|}", c)) {
+			if (strchr("#$%{}", c)) {
 				insert(new MathCharInset(c, LM_TC_TEX));	
 				lastcode_ = LM_TC_VAR;
 				return;
diff --git a/src/mathed/math_hash.C b/src/mathed/math_hash.C
index 9ce9aef14d..7e8b07f3ba 100644
--- a/src/mathed/math_hash.C
+++ b/src/mathed/math_hash.C
@@ -128,7 +128,6 @@ latexkeys_a wordlist_array[] =
 	{"widehat",  LM_TK_DECORATION, 0},
 	{"widetilde",  LM_TK_DECORATION, 0},
 	{"{",  LM_TK_SPECIAL, '{'},
-	{"|",  LM_TK_UNDEF, '|'},
 	{"}",  LM_TK_SPECIAL, '}'}
 };
 
diff --git a/src/mathed/math_macrotable.C b/src/mathed/math_macrotable.C
index effb936f81..ac067a9778 100644
--- a/src/mathed/math_macrotable.C
+++ b/src/mathed/math_macrotable.C
@@ -100,6 +100,7 @@ void MathMacroTable::builtinMacros()
 	createTemplate("owns",         0, "\\ni");
 	createTemplate("gets",         0, "\\leftarrow");
 	createTemplate("to",           0, "\\rightarrow");
+	createTemplate("|",            0, "\\parallel");
 
 	createTemplate("longleftrightarrow", 0, "\\leftarrow\\kern-6mu\\rightarrow");
 	createTemplate("Longleftrightarrow", 0, "\\Leftarrow\\kern-6mu\\Rightarrow");
diff --git a/src/mathed/math_parser.C b/src/mathed/math_parser.C
index 42256d2fbc..d3915d0263 100644
--- a/src/mathed/math_parser.C
+++ b/src/mathed/math_parser.C
@@ -785,17 +785,6 @@ void Parser::parse_into(MathArray & array, unsigned flags, MathTextCodes code)
 			break; 
 		}
 
-		case LM_TK_UNDEF: 
-			if (MathMacroTable::hasTemplate(sval_)) {
-				MathMacro * m = MathMacroTable::cloneTemplate(sval_);
-				for (int i = 0; i < m->nargs(); ++i) 
-					parse_into(m->cell(i), FLAG_ITEM);
-				array.push_back(m);
-				m->metrics(LM_ST_TEXT);
-			} else
-				array.push_back(new MathFuncInset(sval_));
-			break;
-
 		else  LM_TK_SPECIAL:
 			array.push_back(new MathCharInset(ival_, LM_TC_TEX));
 			break;
diff --git a/src/mathed/math_parser.h b/src/mathed/math_parser.h
index 68ef43cce9..067d59b313 100644
--- a/src/mathed/math_parser.h
+++ b/src/mathed/math_parser.h
@@ -55,8 +55,6 @@ enum MathTokenEnum
 	LM_TK_END,
 	///
 	LM_TK_NEWLINE,
-	///
-	LM_TK_UNDEF,
 	/// mathcal, mathrm...
 	LM_TK_OLDFONT,
 	/// cal,...