diff --git a/src/compiler/syntax/parser.js b/src/compiler/syntax/parser.js
index e6aa6c7..b74937e 100644
--- a/src/compiler/syntax/parser.js
+++ b/src/compiler/syntax/parser.js
@@ -1740,22 +1740,22 @@ const ternaryOperator = (parser) => {
     parse(
       '(', opt(_), simpleExpression, opt(_), ')',
       alt(parse(noSpace, '?', noSpace), parse(_, '?', _)), alt(prefixAtom, atom),
-      alt(parse(noSpace, '||', noSpace), parse(_, '||', _)), primitiveExpression,
+      alt(parse(noSpace, ':', noSpace), parse(_, ':', _)), primitiveExpression,
     ),
     parse(
       '(', nextCodeLine, indent, simpleExpression, nextCodeLine, dedent, ')',
       alt(parse(noSpace, '?', noSpace), parse(_, '?', _)), alt(prefixAtom, atom),
-      alt(parse(noSpace, '||', noSpace), parse(_, '||', _)), primitiveExpression,
+      alt(parse(noSpace, ':', noSpace), parse(_, ':', _)), primitiveExpression,
     ),
     parse(
       '(', opt(_), simpleExpression, opt(_), ')',
       alt(parse(noSpace, '?', noSpace), parse(_, '?', _)), primitiveExpression,
-      alt(parse(noSpace, '||', noSpace), parse(_, '||', _)), primitiveExpression,
+      alt(parse(noSpace, ':', noSpace), parse(_, ':', _)), primitiveExpression,
     ),
     parse(
       '(', nextCodeLine, indent, simpleExpression, nextCodeLine, dedent, ')',
       alt(parse(noSpace, '?', noSpace), parse(_, '?', _)), primitiveExpression,
-      alt(parse(noSpace, '||', noSpace), parse(_, '||', _)), primitiveExpression,
+      alt(parse(noSpace, ':', noSpace), parse(_, ':', _)), primitiveExpression,
     ),
   )(parser);
 
diff --git a/src/compiler/syntax/parser_test_2.js b/src/compiler/syntax/parser_test_2.js
index e810f4c..7ec740d 100644
--- a/src/compiler/syntax/parser_test_2.js
+++ b/src/compiler/syntax/parser_test_2.js
@@ -4508,11 +4508,11 @@ test(
 );
 
 print('============== TERNARYOPERATOR ==============');
-lexer = new Lexer('(5_000)? 0b10.001 || 0x7_EFF8');
+lexer = new Lexer('(5_000)? 0b10.001 : 0x7_EFF8');
 parser = new Parser(lexer.lex().tokens);
 result = ternaryOperator(parser);
 test(
-  String.raw`(5_000)? 0b10.001 || 0x7_EFF8--------->FAIL`,
+  String.raw`(5_000)? 0b10.001 : 0x7_EFF8--------->FAIL`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -4537,11 +4537,11 @@ test(
   },
 );
 
-lexer = new Lexer('(5_000) ? 0b10.001 ||0x7_EFF8');
+lexer = new Lexer('(5_000) ? 0b10.001 :0x7_EFF8');
 parser = new Parser(lexer.lex().tokens);
 result = ternaryOperator(parser);
 test(
-  String.raw`(5_000)? 0b10.001 ||0x7_EFF8--------->FAIL`,
+  String.raw`(5_000)? 0b10.001 ;0x7_EFF8--------->FAIL`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -4566,11 +4566,11 @@ test(
   },
 );
 
-lexer = new Lexer('(5_000) ? 0b10.001 || 0x7_EFF8');
+lexer = new Lexer('(5_000) ? 0b10.001 : 0x7_EFF8');
 parser = new Parser(lexer.lex().tokens);
 result = ternaryOperator(parser);
 test(
-  String.raw`(5_000) ? 0b10.001 || 0x7_EFF8`,
+  String.raw`(5_000) ? 0b10.001 : 0x7_EFF8`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -4581,7 +4581,7 @@ test(
   {
     parser: {
       tokenPosition: 6,
-      column: 30,
+      column: 29,
     },
     result: {
       success: true,
@@ -4604,11 +4604,11 @@ test(
   },
 );
 
-lexer = new Lexer('(  \n    5_000\n) ? 0b10.001 || 0x7_EFF8');
+lexer = new Lexer('(  \n    5_000\n) ? 0b10.001 : 0x7_EFF8');
 parser = new Parser(lexer.lex().tokens);
 result = ternaryOperator(parser);
 test(
-  String.raw`(  \n    5_000\n) ? 0b10.001 || 0x7_EFF8`,
+  String.raw`(  \n    5_000\n) ? 0b10.001 : 0x7_EFF8`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -4619,7 +4619,7 @@ test(
   {
     parser: {
       tokenPosition: 8,
-      column: 38,
+      column: 37,
     },
     result: {
       success: true,
@@ -4642,12 +4642,12 @@ test(
   },
 );
 
-lexer = new Lexer('(  \n    5_000\n) ? +0b10.001||0x7_EFF8');
+lexer = new Lexer('(  \n    5_000\n) ? +0b10.001:0x7_EFF8');
 parser = new Parser(lexer.lex().tokens);
 result = ternaryOperator(parser);
 print(result);
 test(
-  String.raw`(  \n    5_000\n) ? +0b10.001||0x7_EFF8`,
+  String.raw`(  \n    5_000\n) ? +0b10.001:0x7_EFF8`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -4658,7 +4658,7 @@ test(
   {
     parser: {
       tokenPosition: 9,
-      column: 37,
+      column: 36,
     },
     result: {
       success: true,
diff --git a/src/compiler/syntax/parser_test_3.js b/src/compiler/syntax/parser_test_3.js
index ebb1b3c..b0e2b40 100644
--- a/src/compiler/syntax/parser_test_3.js
+++ b/src/compiler/syntax/parser_test_3.js
@@ -1793,11 +1793,11 @@ test(
   },
 );
 
-lexer = new Lexer('(2) ? 4 || 7');
+lexer = new Lexer('(2) ? 4 : 7');
 parser = new Parser(lexer.lex().tokens);
 result = simpleExpression(parser);
 test(
-  String.raw`(2) ? 4 || 7`,
+  String.raw`(2) ? 4 : 7`,
   {
     parser: {
       tokenPosition: parser.tokenPosition,
@@ -1808,7 +1808,7 @@ test(
   {
     parser: {
       tokenPosition: 6,
-      column: 12,
+      column: 11,
     },
     result: {
       success: true,
@@ -1877,7 +1877,7 @@ test(
   },
 );
 
-lexer = new Lexer('1 + 2, \n(2) ? 4 || 5_000');
+lexer = new Lexer('1 + 2, \n(2) ? 4 : 5_000');
 parser = new Parser(lexer.lex().tokens);
 result = tupleExpression(parser);
 test(
@@ -1892,7 +1892,7 @@ test(
   {
     parser: {
       tokenPosition: 11,
-      column: 24,
+      column: 23,
     },
     result: {
       success: true,