diff --git a/test/tls13encryptiontest.c b/test/tls13encryptiontest.c
index 33a70a17c0d558d3e0436ae6be2b7ef5284829c1..06bbbb3fb34a7126a38e9ed78e90bfa3a4dc9fd4 100644
--- a/test/tls13encryptiontest.c
+++ b/test/tls13encryptiontest.c
@@ -32,7 +32,7 @@ typedef struct {
     const char *seq;
 } RECORD_DATA;
 
-RECORD_DATA refdata[] = {
+static RECORD_DATA refdata[] = {
     {
         {
             "0800001e001c000a00140012001d001700180019010001010102010301040000"