diff --git a/chapter_1/exercise_1_02/printf_argument.c b/chapter_1/exercise_1_02/printf_argument.c
index a33077b..a580c37 100644
--- a/chapter_1/exercise_1_02/printf_argument.c
+++ b/chapter_1/exercise_1_02/printf_argument.c
@@ -2,6 +2,6 @@
 
 int main(void)
 {
-  printf("hello: \n");
+  printf("hello, world\c");
   return 0;
 }