diff --git a/libgloss/aarch64/crt0.S b/libgloss/aarch64/crt0.S
index cbff11a49..3bf027874 100644
--- a/libgloss/aarch64/crt0.S
+++ b/libgloss/aarch64/crt0.S
@@ -157,6 +157,7 @@
 
 	bl	FUNCTION (_init)
 
+#ifdef ARM_RDI_MONITOR
 	/* Fetch and parse the command line.  */
 	ldr	x1, .Lcmdline		/* Command line descriptor.  */
 	mov	w0, #AngelSVC_Reason_GetCmdLine
@@ -219,6 +220,11 @@
 	and	x4, x1, ~15
 	mov	sp, x4
 
+#else
+	mov	x0, #0	/* argc = 0 */
+	mov	x1, #0	/* argv = NULL */
+#endif
+
 	bl	FUNCTION (main)
 
 	b	FUNCTION (exit)		/* Cannot return.  */