diff --git a/client.c b/client.c
index 63e2ad6..47d03f5 100644
--- a/client.c
+++ b/client.c
@@ -75,10 +75,11 @@ void DisplayProgressBar(size_t offset,size_t total,double cur_progress){
 }
 void DisplayProgressBar100Percent(size_t total){
     size_t i;
-    char buf[PROGRESS_BAR_WIDTH];
+    char buf[PROGRESS_BAR_WIDTH+1];
     for (i = 0; i < PROGRESS_BAR_WIDTH; i++){
         buf[i] = '=';
     }
+    buf[PROGRESS_BAR_WIDTH] = '\0';
     printf("\r[%s]: 100%% bytes: %ld/%ld bytes\n",buf,total,total);
 }
 int recvFile(int sock, const char * filename,size_t file_size){
diff --git a/p-client.c b/p-client.c
index ee26707..d36f3e6 100644
--- a/p-client.c
+++ b/p-client.c
@@ -76,10 +76,11 @@ void DisplayProgressBar(size_t offset,size_t total,double cur_progress){
 }
 void DisplayProgressBar100Percent(size_t total){
     size_t i;
-    char buf[PROGRESS_BAR_WIDTH];
+    char buf[PROGRESS_BAR_WIDTH+1];
     for (i = 0; i < PROGRESS_BAR_WIDTH; i++){
         buf[i] = '=';
     }
+    buf[PROGRESS_BAR_WIDTH] = '\0';
     printf("\r[%s]: 100%% bytes: %ld/%ld bytes\n",buf,total,total);
 }
 int recvFile(int sock, const char * filename,size_t file_size){