diff --git a/examples/exit.asm b/examples/exit.asm
new file mode 100644
index 0000000..e69de29
diff --git a/examples/hello-world.asm b/examples/hello-world.asm
new file mode 100644
index 0000000..e69de29
diff --git a/riscemu/Syscall.py b/riscemu/Syscall.py
index 74aeb64..5d3c117 100644
--- a/riscemu/Syscall.py
+++ b/riscemu/Syscall.py
@@ -98,7 +98,7 @@ class SyscallInterface:
 
         data = scall.cpu.mmu.read(addr, size)
 
-        if not isinstance(str, bytearray):
+        if not isinstance(data, bytearray):
             print(FMT_SYSCALL + '[Syscall] write: writing from .text region not supported.' + FMT_NONE)
             return scall.ret(-1)