diff --git a/mutex/gjb_S0100509GN_1.c b/mutex/gjb_S0100509GN_1.c
index fd475c8c9301c6f7a293743cdf07d51f69ad68ea..a5ee2de714459ed52219388481880aba35ab7ea5 100644
--- a/mutex/gjb_S0100509GN_1.c
+++ b/mutex/gjb_S0100509GN_1.c
@@ -45,7 +45,7 @@ int main(int argc, char **argv)
         printf("Set type RECURSIVE failed, errno=%d\n",errno);
         goto __errno_handle;
     } else {
-        printf("pthread_mutexattr_settype set PTHREAD_MUTEX_NORMAL success");
+        printf("pthread_mutexattr_settype set PTHREAD_MUTEX_NORMAL success\n");
     }
 
     if ((ret = pthread_mutex_init(&mtx_06GN, &ma))) {
@@ -68,7 +68,7 @@ int main(int argc, char **argv)
         goto __errno_handle;
 
     } else {
-        printf("pthread_mutex_lock lock success");
+        printf("pthread_mutex_lock lock success\n");
     }
 
     if ((ret = pthread_mutex_unlock(&mtx_06GN))) {