diff --git a/lib/openssl.c b/lib/openssl.c
index 05f82a2..36344a9 100644
--- a/lib/openssl.c
+++ b/lib/openssl.c
@@ -118,7 +118,7 @@
 
 static const struct st_ptls_openssl_signature_scheme_t *lookup_signature_schemes(EVP_PKEY *key)
 {
-    static const struct st_ptls_openssl_signature_scheme_t *schemes = NULL;
+    const struct st_ptls_openssl_signature_scheme_t *schemes = NULL;
 
     switch (EVP_PKEY_id(key)) {
     case EVP_PKEY_RSA: