diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index d296ed308..00f2a05cb 100644
--- a/lib/vtls/cyassl.c
+++ b/lib/vtls/cyassl.c
@@ -47,6 +47,7 @@
 #include "curl_memory.h"
 
 #include <cyassl/ssl.h>
+#include <cyassl/version.h>
 #ifdef HAVE_CYASSL_ERROR_SSL_H
 #include <cyassl/error-ssl.h>
 #else