diff --git a/13/exercises/06/README.md b/13/exercises/06/README.md
index e035719f..6f21b81a 100644
--- a/13/exercises/06/README.md
+++ b/13/exercises/06/README.md
@@ -9,7 +9,7 @@ clarity.
 ```c
 void censor(char *str) {
     char *c = str;
-    while (c+2 != '\0') {
+    while (*(c+2) != '\0') {
         if (*c == 'f' && *(c+1) == 'o' && *(c+2) == 'o')
             *c = *(c+1) = *(c+2) = 'x';
         c++;