diff --git a/include/gmssl/sm3_xmss.h b/include/gmssl/sm3_xmss.h
index 2ac67f1e..1c10a781 100644
--- a/include/gmssl/sm3_xmss.h
+++ b/include/gmssl/sm3_xmss.h
@@ -10,6 +10,7 @@
 #ifndef GMSSL_SM3_XMSS_H
 #define GMSSL_SM3_XMSS_H
 
+#include <stdio.h>
 #include <string.h>
 #include <stdint.h>
 #include <gmssl/sm3.h>