diff --git a/Huawei/Fingerprint/input.cpp b/Huawei/Fingerprint/input.cpp
index ee0cfb5..9538cd1 100644
--- a/Huawei/Fingerprint/input.cpp
+++ b/Huawei/Fingerprint/input.cpp
@@ -5,6 +5,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include <string.h>
 #include <linux/input.h>
 
 int open_fingerprint() {