diff --git a/Lexer.Tests/MLexerShould.cs b/Lexer.Tests/MLexerShould.cs
index 603241f..06c8985 100644
--- a/Lexer.Tests/MLexerShould.cs
+++ b/Lexer.Tests/MLexerShould.cs
@@ -261,5 +261,16 @@ namespace Lexer.Tests
                 Assert.Less(1, tokens.Count);
             }
         }
+
+        [TestCase(".42i")]
+        [TestCase("42i")]
+        [TestCase("42e-1i")]
+        public void ParseComplexNumbers(string text)
+        {
+            var sut = CreateLexer(text);
+            var tokens = sut.ParseAll();
+            Assert.AreEqual(2, tokens.Count);
+            Assert.AreEqual(TokenKind.NumberLiteral, tokens[0].Kind);            
+        }
     }
 }
\ No newline at end of file
diff --git a/Lexer/MLexer.cs b/Lexer/MLexer.cs
index 461d18f..d9ae32a 100644
--- a/Lexer/MLexer.cs
+++ b/Lexer/MLexer.cs
@@ -359,6 +359,10 @@ namespace Lexer
 
             if (success)
             {
+                if (Window.PeekChar(n) == 'i' || Window.PeekChar(n) == 'j')
+                {
+                    n++;
+                }
                 var s = Window.GetAndConsumeChars(n);
                 return PureTokenFactory.CreateNumberLiteral(s);
             }