diff --git a/substrate/console b/substrate/console
index aedc0883..c7711fc3 100644
--- a/substrate/console
+++ b/substrate/console
@@ -56,8 +56,8 @@ namespace substrate
 	public:
 		constexpr consoleStream_t() noexcept = default;
 		consoleStream_t(const int32_t desc) noexcept : fd{desc} { checkTTY(); }
-		constexpr bool valid() const noexcept { return fd != -1; }
-		constexpr bool isTTY() const noexcept { return _tty; }
+		SUBSTRATE_NO_DISCARD(constexpr bool valid() const noexcept) { return fd != -1; }
+		SUBSTRATE_NO_DISCARD(constexpr bool isTTY() const noexcept) { return _tty; }
 #if defined(_WIN32)
 		void *handle() const noexcept { return reinterpret_cast<void *>(_get_osfhandle(fd)); }
 #endif
@@ -299,7 +299,7 @@ namespace substrate
 					stream.write(char(digit + 7));
 				else
 					stream.write(digit);
-				value <<= 4;
+				value <<= 4U;
 			}
 		}
 	};