diff --git a/arch/x86/kernel/include/syscall_list.h b/arch/x86/kernel/include/syscall_list.h
index 21738bea..b079ca4e 100644
--- a/arch/x86/kernel/include/syscall_list.h
+++ b/arch/x86/kernel/include/syscall_list.h
@@ -43,6 +43,7 @@ SYSCALL_HANDLED(24, sched_yield)
 SYSCALL_HANDLED(28, madvise)
 SYSCALL_HANDLED(39, getpid)
 SYSCALL_HANDLED(56, clone)
+SYSCALL_HANDLED(59, execve)
 SYSCALL_HANDLED(60, exit)
 SYSCALL_HANDLED(62, kill)
 SYSCALL_DELEGATED(63, uname)
diff --git a/kernel/syscall.c b/kernel/syscall.c
index 35d1c31f..34970de5 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -922,13 +922,22 @@ SYSCALL_DECLARE(arch_prctl)
 	                     ihk_mc_syscall_arg1(ctx));
 }
 
+SYSCALL_DECLARE(execve)
+{
+	return -EOPNOTSUPP;
+}
 
 SYSCALL_DECLARE(clone)
 {
 	int cpuid;
 	int clone_flags = ihk_mc_syscall_arg0(ctx);
 	struct process *new;
-	
+
+	if(clone_flags == 0x1200011){
+		// fork()
+		return -EOPNOTSUPP;
+	}
+
 	dkprintf("[%d] clone(): stack_pointr: 0x%lX\n",
 	         ihk_mc_get_processor_id(), 
 			 (unsigned long)ihk_mc_syscall_arg1(ctx));