diff --git a/rpcs3/Emu/RSX/RSXThread.h b/rpcs3/Emu/RSX/RSXThread.h
index a86263308f..97691fdbf7 100644
--- a/rpcs3/Emu/RSX/RSXThread.h
+++ b/rpcs3/Emu/RSX/RSXThread.h
@@ -46,8 +46,8 @@ namespace rsx
 
 		rsx_iomap_table() noexcept
 		{
-			std::fill(ea.begin(), ea.end(), -1);
-			std::fill(io.begin(), io.end(), -1);
+			std::memset(ea.data(), -1, sizeof(ea));
+			std::memset(io.data(), -1, sizeof(io));
 		}
 
 		// Try to get the real address given a mapped address