diff --git a/kernel/src/sys/Syscall.cpp b/kernel/src/sys/Syscall.cpp
index 99a7c4fa..e71504b1 100644
--- a/kernel/src/sys/Syscall.cpp
+++ b/kernel/src/sys/Syscall.cpp
@@ -19,7 +19,7 @@ void Syscall::entry(Context* context)
     case SYS_write: // sys_write
         sys_write(context, (const char*)context->rdi, context->rsi);
         break;
-    case SYS_paint: sys_paint(context, context->rdi, context->rsi, context->r10, context->r8, context->r9); break;
+    case SYS_paint: sys_paint(context, context->rdi, context->rsi, context->rdx, context->r10, context->r8); break;
     case SYS_rand: sys_rand(context); break;
     case SYS_version: sys_version(context, (char*)context->rdi, context->rsi); break;
     case SYS_gettid: sys_gettid(context); break;