diff --git a/src/sudoku.s b/src/sudoku.s
index 8cbd091..7ad4e8e 100644
--- a/src/sudoku.s
+++ b/src/sudoku.s
@@ -122,8 +122,8 @@ PFIENO: MOVEI B,040                    ;Print a space.
         SOJE  C,PFIEEX                 ;Exit, if no more elements are read.
         ADDI  B,060                    ;Convert number into char.
         .IOT  CHTTYO,B                 ;Print the number.
-        .IOT  CHTTYO,040
-        .IOT  CHTTYO,174
+        .IOT  CHTTYO,[040]
+        .IOT  CHTTYO,[174]
         SOJE  Y,PFIELN                 ;End the line and start a new one.
         JUMPA PFIENO                   ;Jump back to print the next number.