diff --git a/features/FEATURE_LWIP/lwip-interface/lwip-eth/arch/TARGET_Realtek/Lwipopts_conf.h b/features/FEATURE_LWIP/lwip-interface/lwip-eth/arch/TARGET_Realtek/lwipopts_conf.h
similarity index 100%
rename from features/FEATURE_LWIP/lwip-interface/lwip-eth/arch/TARGET_Realtek/Lwipopts_conf.h
rename to features/FEATURE_LWIP/lwip-interface/lwip-eth/arch/TARGET_Realtek/lwipopts_conf.h