diff --git a/kernel/src/sys/file.cpp b/kernel/src/sys/file.cpp
index 3838af14..cc97aaf5 100644
--- a/kernel/src/sys/file.cpp
+++ b/kernel/src/sys/file.cpp
@@ -16,6 +16,8 @@ Result<u64> sys_read(Registers*, SyscallArgs args)
     u8* buf = (u8*)args[1];
     usize size = (usize)args[2];
 
+    if (!size) return 0;
+
     if (!MemoryManager::validate_user_write(buf, size)) return err(EFAULT);
 
     Thread* current = Scheduler::current();
@@ -44,6 +46,8 @@ Result<u64> sys_write(Registers*, SyscallArgs args)
     const u8* buf = (const u8*)args[1];
     usize size = (usize)args[2];
 
+    if (!size) return 0;
+
     if (!MemoryManager::validate_user_read(buf, size)) return err(EFAULT);
 
     Thread* current = Scheduler::current();