--- a/gdb/aarch64-linux-nat.c
+++ b/gdb/aarch64-linux-nat.c
@@ -445,7 +445,8 @@
   gdb_assert (regno != -1);
   gdb_assert (tdep->tls_register_count > 0);
 
-  uint64_t tpidrs[tdep->tls_register_count] = { 0 };
+  uint64_t tpidrs[tdep->tls_register_count];
+  memset (tpidrs, 0, sizeof (tpidrs));
   struct iovec iovec;
   iovec.iov_base = tpidrs;
   iovec.iov_len = sizeof (tpidrs);
@@ -471,7 +472,8 @@
   gdb_assert (regno != -1);
   gdb_assert (tdep->tls_register_count > 0);
 
-  uint64_t tpidrs[tdep->tls_register_count] = { 0 };
+  uint64_t tpidrs[tdep->tls_register_count];
+  memset (tpidrs, 0, sizeof (tpidrs));
 
   for (int i = 0; i < tdep->tls_register_count; i++)
     {