diff --git a/devicemodel/core/sw_load_common.c b/devicemodel/core/sw_load_common.c
index c820f2b3c..0a2a5d7b8 100644
--- a/devicemodel/core/sw_load_common.c
+++ b/devicemodel/core/sw_load_common.c
@@ -36,7 +36,7 @@
 #include "pci_core.h"
 
 int with_bootargs;
-static char bootargs[STR_LEN];
+static char bootargs[BOOT_ARG_LEN];
 
 /*
  * Default e820 mem map:
@@ -106,9 +106,9 @@ const struct e820_entry e820_default_entries[NUM_E820_ENTRIES] = {
 int
 acrn_parse_bootargs(char *arg)
 {
-	size_t len = strnlen(arg, STR_LEN);
+	size_t len = strnlen(arg, BOOT_ARG_LEN);
 
-	if (len < STR_LEN) {
+	if (len < BOOT_ARG_LEN) {
 		strncpy(bootargs, arg, len + 1);
 		with_bootargs = 1;
 		printf("SW_LOAD: get bootargs %s\n", bootargs);
diff --git a/devicemodel/include/sw_load.h b/devicemodel/include/sw_load.h
index be4b817f8..a19f4bc91 100644
--- a/devicemodel/include/sw_load.h
+++ b/devicemodel/include/sw_load.h
@@ -29,6 +29,7 @@
 #define _CORE_SW_LOAD_
 
 #define STR_LEN 1024
+#define BOOT_ARG_LEN 2048
 
 /* E820 memory types */
 #define E820_TYPE_RAM           1   /* EFI 1, 2, 3, 4, 5, 6, 7 */