diff --git a/src/sudoku.s b/src/sudoku.s
index 8e3f3b9..6659aa4 100644
--- a/src/sudoku.s
+++ b/src/sudoku.s
@@ -114,7 +114,7 @@ PFIELN: .IOT  CHTTYO,[^M]              ;Print a carriage return.
         MOVEI Y,011                    ;Load the index register with 9.
         MOVEI B,174                    ;Print a '|' symbol.
         .IOT  CHTTYO,B
-PFIENO: MOVEi B,020                    ;Print a space.
+PFIENO: MOVEI B,020                    ;Print a space.
         .IOT  CHTTYO,B
         ILDB  B,X                      ;Load the next field.
         JUMPE B,PFIEEX                 ;Exit, if no more elements are read.