diff --git a/examples/calculator/calculator.ws b/examples/calculator/calculator.ws
index 8db27a0..caa2c72 100644
--- a/examples/calculator/calculator.ws
+++ b/examples/calculator/calculator.ws
@@ -9,7 +9,7 @@ HACKL AMOI WOS calc(operator, left, right) {
         I SCHAU NUR '/':
             DRAH DI HAM left BRÖCKERL right
         NA GEH:
-            GEH SCHEISSN ('invalid operator')          
+            GEH SCHEISSN 'invalid operator'        
     }
 
     DRAH DI HAM sum
@@ -19,4 +19,4 @@ SCHAU MA MOL {
     I MAN JA NUR (calc('+', 1, 2))
 } LECK OASCH (err) {
     GSCHISSN GRISSN ('invalid operation')
-}
\ No newline at end of file
+}