--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -43,6 +43,34 @@ void prom_free_prom_memory(void)
 {
 }
 
+#ifdef CONFIG_IMAGE_CMDLINE_HACK
+extern char __image_cmdline[];
+
+static void __init
+prom_init_image_cmdline(void)
+{
+	char *p = __image_cmdline;
+	int replace = 0;
+
+	if (*p == '-') {
+		replace = 1;
+		p++;
+	}
+
+	if (*p == '\0')
+		return;
+
+	if (replace) {
+		strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
+	} else {
+		strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+		strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+	}
+}
+#else
+static void __init prom_init_image_cmdline(void) { return; }
+#endif
+
 static void __init prom_init_cmdline(void)
 {
 	int argc = fw_arg0;
@@ -59,6 +87,7 @@ static void __init prom_init_cmdline(voi
 			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 		}
 	}
+	prom_init_image_cmdline();
 }
 
 void __iomem *ltq_remap_resource(struct resource *res)