diff --git a/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/Makefile b/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/Makefile
index ac7f187f4..df27139b1 100644
--- a/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/Makefile
+++ b/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/Makefile
@@ -98,6 +98,8 @@ DEPDIR   := ./.dep
 include $(CHIBIOS)/os/license/license.mk
 # Startup files.
 include $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk/startup_stm32g4xx.mk
+# Common files.
+include $(CHIBIOS)/os/common/utils/utils.mk
 # HAL-OSAL files (optional).
 include $(CHIBIOS)/os/hal/hal.mk
 include $(CHIBIOS)/os/hal/ports/STM32/STM32G4xx/platform.mk
@@ -107,6 +109,8 @@ include $(CHIBIOS)/os/hal/osal/rt-nil/osal.mk
 include $(CHIBIOS)/os/rt/rt.mk
 include $(CHIBIOS)/os/common/ports/ARMv7-M-ALT/compilers/GCC/mk/port.mk
 include $(CHIBIOS)/os/sb/host/compilers/GCC/sbhost.mk
+# VFS files (optional).
+include $(CHIBIOS)/os/vfs/vfs.mk
 # Auto-build files in ./source recursively.
 include $(CHIBIOS)/tools/mk/autobuild.mk
 # Other files (optional).
diff --git a/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/cfg/sbconf.h b/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/cfg/sbconf.h
index 94ea0cdba..cfd1a98f5 100644
--- a/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/cfg/sbconf.h
+++ b/demos/STM32/RT-STM32G474RE-NUCLEO64-SB_HOST_DYNAMIC/cfg/sbconf.h
@@ -45,6 +45,13 @@
 #define SB_CFG_ENABLE_VFS                   TRUE
 #endif
 
+/**
+ * @brief   Number of file descriptors for each sandbox.
+ */
+#if !defined(SB_CFG_FD_NUM) || defined(__DOXYGEN__)
+#define SB_CFG_FD_NUM                       12
+#endif
+
 #endif  /* SBCONF_H */
 
 /** @} */