diff --git a/src/main/target/STM32F3DISCOVERY/target.h b/src/main/target/STM32F3DISCOVERY/target.h
index e8768ff1b1..78d0dcc604 100644
--- a/src/main/target/STM32F3DISCOVERY/target.h
+++ b/src/main/target/STM32F3DISCOVERY/target.h
@@ -36,9 +36,22 @@
 
 #define TARGET_BOARD_IDENTIFIER "SDF3" // STM Discovery F3
 
-#define CONFIG_FASTLOOP_PREFERRED_ACC ACC_NONE
+// Removed to make the firmware fit into flash (in descending order of priority):
+//#undef USE_GYRO_OVERFLOW_CHECK
+//#undef USE_GYRO_LPF2
 
-#undef USE_OSD // ROM SAVING
+//#undef USE_TELEMETRY_HOTT
+//#undef USE_TELEMETRY_MAVLINK
+//#undef USE_TELEMETRY_LTM
+//#undef USE_SERIALRX_XBUS
+
+#undef USE_BOARD_INFO
+#undef USE_EXTENDED_CMS_MENUS
+#undef USE_RTC_TIME
+#undef USE_RX_MSP
+#undef USE_ESC_SENSOR_INFO
+
+#define CONFIG_FASTLOOP_PREFERRED_ACC ACC_NONE
 
 #define CURRENT_TARGET_CPU_VOLTAGE 3.0