diff --git a/communication_techniques/src/communication/common.c b/communication_techniques/src/communication/common.c
index 76193b4..03f02dd 100644
--- a/communication_techniques/src/communication/common.c
+++ b/communication_techniques/src/communication/common.c
@@ -58,10 +58,13 @@ int init_producer_thread(void)
 		pthread_mutex_unlock(&init_lock);
 		return -1;
 	}
-	pthread_mutex_lock(&init_lock);
-	init = 1;
-	pthread_cond_signal(&init_cond);
-	pthread_mutex_unlock(&init_lock);
+	if (thread_num == nb_prod - 1)
+	{
+		pthread_mutex_lock(&init_lock);
+		init = 1;
+		pthread_cond_signal(&init_cond);
+		pthread_mutex_unlock(&init_lock);
+	}
 	return 0;
 }