diff --git a/firmware/config/boards/atlas/board.mk b/firmware/config/boards/atlas/board.mk
index f740a335bb..7fd3295659 100644
--- a/firmware/config/boards/atlas/board.mk
+++ b/firmware/config/boards/atlas/board.mk
@@ -13,6 +13,7 @@ DDEFS += -DHW_ATLAS=1
 
 # Atlas needs networking library
 LWIP = yes
+ALLOW_SHADOW = yes
 DDEFS += -DEFI_ETHERNET=TRUE
 
 DDEFS += -DSHORT_BOARD_NAME=atlas -DSTATIC_BOARD_ID=STATIC_BOARD_ID_ATLAS
diff --git a/firmware/config/boards/nucleo_f429/board.mk b/firmware/config/boards/nucleo_f429/board.mk
index cf5ff1a005..6b1590aadb 100644
--- a/firmware/config/boards/nucleo_f429/board.mk
+++ b/firmware/config/boards/nucleo_f429/board.mk
@@ -4,6 +4,7 @@ DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::B14
 
 # Enable ethernet
 LWIP = yes
+ALLOW_SHADOW = yes
 DDEFS += -DEFI_ETHERNET=TRUE
 
 # This is an F429!
diff --git a/firmware/config/boards/nucleo_f767/board.mk b/firmware/config/boards/nucleo_f767/board.mk
index 812a284a34..d8ddd1bded 100644
--- a/firmware/config/boards/nucleo_f767/board.mk
+++ b/firmware/config/boards/nucleo_f767/board.mk
@@ -10,6 +10,7 @@ DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::B14
 
 # Enable ethernet
 LWIP = yes
+ALLOW_SHADOW = yes
 DDEFS += -DEFI_ETHERNET=TRUE
 
 DEBUG_LEVEL_OPT = -Os -ggdb -g
diff --git a/firmware/config/boards/nucleo_h743/board.mk b/firmware/config/boards/nucleo_h743/board.mk
index c7d2b90fd5..c0d74450e9 100644
--- a/firmware/config/boards/nucleo_h743/board.mk
+++ b/firmware/config/boards/nucleo_h743/board.mk
@@ -6,6 +6,7 @@ DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::B14
 
 # Enable ethernet
 LWIP = yes
+ALLOW_SHADOW = yes
 DDEFS += -DEFI_ETHERNET=TRUE
 
 DDEFS += -DFIRMWARE_ID=\"nucleo_h743\"
diff --git a/firmware/rusefi_rules.mk b/firmware/rusefi_rules.mk
index 8799aa5d3b..510a2332bc 100644
--- a/firmware/rusefi_rules.mk
+++ b/firmware/rusefi_rules.mk
@@ -1,5 +1,9 @@
 # Warnings-as-errors...
-RUSEFI_OPT = -Werror -Werror=shadow
+RUSEFI_OPT = -Werror
+
+ifneq ($(ALLOW_SHADOW),yes)
+    RUSEFI_OPT += -Werror=shadow
+endif
 
 # ...except these few
 RUSEFI_OPT += -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=sign-compare -Wno-error=unused-parameter