diff --git a/headers/private/kernel/arch/x86/arch_thread.h b/headers/private/kernel/arch/x86/arch_thread.h
index 0c1bc3b13d..d0454dfa55 100644
--- a/headers/private/kernel/arch/x86/arch_thread.h
+++ b/headers/private/kernel/arch/x86/arch_thread.h
@@ -24,7 +24,7 @@ void i386_end_return_from_signal();
 
 // override empty macro
 #undef arch_syscall_64_bit_return_value
-void arch_syscall_64_bit_return_value();
+void arch_syscall_64_bit_return_value(void);
 
 
 static