diff --git a/demos/ARMCM3-STM32F103-FATFS-GCC/main.c b/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
index 2422f652b..c9407731c 100644
--- a/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
+++ b/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
@@ -101,7 +101,7 @@ static FRESULT scan_files(char *path)
 /* Command line related.                                                     */
 /*===========================================================================*/
 
-#define SHELL_WA_SIZE   THD_WA_SIZE(1024)
+#define SHELL_WA_SIZE   THD_WA_SIZE(2048)
 #define TEST_WA_SIZE    THD_WA_SIZE(256)
 
 static void cmd_mem(BaseChannel *chp, int argc, char *argv[]) {