diff --git a/crypto/thread_test.c b/crypto/thread_test.c
index bc6bfa74..714bef7a 100644
--- a/crypto/thread_test.c
+++ b/crypto/thread_test.c
@@ -100,6 +100,9 @@ static void call_once_thread(void) {
   CRYPTO_once(&g_test_once, once_init);
 }
 
+static CRYPTO_once_t once_init_value = CRYPTO_ONCE_INIT;
+static CRYPTO_once_t once_bss;
+
 static int test_once(void) {
   if (g_once_init_called != 0) {
     fprintf(stderr, "g_once_init_called was non-zero at start.\n");
@@ -126,10 +129,8 @@ static int test_once(void) {
   if (FIPS_mode()) {
     /* Our FIPS tooling currently requires that |CRYPTO_ONCE_INIT| is all
      * zeros, so the |CRYPTO_once_t| is placed in the bss. */
-    static const CRYPTO_once_t once_init_value = CRYPTO_ONCE_INIT;
-    static const CRYPTO_once_t once_bss;
-    if (OPENSSL_memcmp(&once_init_value, &once_bss, sizeof(CRYPTO_once_t)) !=
-        0) {
+    if (OPENSSL_memcmp((void *)&once_init_value, (void *)&once_bss,
+                       sizeof(CRYPTO_once_t)) != 0) {
       fprintf(stderr, "CRYPTO_ONCE_INIT did not expand to all zeros.\n");
       return 0;
     }