diff --git a/BAN/include/BAN/Errors.h b/BAN/include/BAN/Errors.h
index 654cf8fa..d4e2c706 100644
--- a/BAN/include/BAN/Errors.h
+++ b/BAN/include/BAN/Errors.h
@@ -25,12 +25,12 @@ namespace BAN
 	class Error
 	{
 	private:
-		static constexpr uint32_t kernel_error_mask = 0x80000000;
+		static constexpr uint64_t kernel_error_mask = uint64_t(1) << 63;
 
 	public:
 		static Error from_error_code(Kernel::ErrorCode error)
 		{
-			return Error((uint32_t)error | kernel_error_mask);
+			return Error((uint64_t)error | kernel_error_mask);
 		}
 		static Error from_errno(int error)
 		{
@@ -42,7 +42,7 @@ namespace BAN
 			return (Kernel::ErrorCode)(m_error_code & ~kernel_error_mask);
 		}
 
-		uint32_t get_error_code() const { return m_error_code; }
+		uint64_t get_error_code() const { return m_error_code; }
 		BAN::StringView get_message() const
 		{
 			if (m_error_code & kernel_error_mask)
@@ -51,11 +51,11 @@ namespace BAN
 		}
 
 	private:
-		Error(uint32_t error)
+		Error(uint64_t error)
 			: m_error_code(error)
 		{}
 
-		uint32_t m_error_code;
+		uint64_t m_error_code;
 	};
 
 	template<typename T>
diff --git a/libc/stdlib.cpp b/libc/stdlib.cpp
index 7e9cd271..8209b12d 100644
--- a/libc/stdlib.cpp
+++ b/libc/stdlib.cpp
@@ -60,7 +60,7 @@ char* getenv(const char*)
 void* malloc(size_t bytes)
 {
 	long res = syscall(SYS_ALLOC, bytes);
-	if (res == -1)
+	if (res < 0)
 		return nullptr;
 	return (void*)res;
 }