diff --git a/firmware/chibios/boards/OLIMEX_STM32_E407/board.h b/firmware/chibios/boards/OLIMEX_STM32_E407/board.h
index 5adefd82ef..413904a33e 100644
--- a/firmware/chibios/boards/OLIMEX_STM32_E407/board.h
+++ b/firmware/chibios/boards/OLIMEX_STM32_E407/board.h
@@ -325,7 +325,7 @@
                                      PIN_ODR_HIGH(GPIOA_PIN5) |             \
                                      PIN_ODR_HIGH(GPIOA_PIN6) |             \
                                      PIN_ODR_HIGH(GPIOA_ETH_RMII_CRS_DV) |  \
-                                     PIN_ODR_HIGH(GPIOA_USB_HS_BUSON) |     \
+                                     PIN_ODR_LOW(GPIOA_USB_HS_BUSON) |      \
                                      PIN_ODR_HIGH(GPIOA_OTG_FS_VBUS) |      \
                                      PIN_ODR_HIGH(GPIOA_OTG_FS_ID) |        \
                                      PIN_ODR_HIGH(GPIOA_OTG_FS_DM) |        \
@@ -434,7 +434,7 @@
                                      PIN_PUPDR_PULLDOWN(GPIOB_OTG_HS_VBUS) |\
                                      PIN_PUPDR_FLOATING(GPIOB_OTG_HS_DM) |  \
                                      PIN_PUPDR_FLOATING(GPIOB_OTG_HS_DP))
-#define VAL_GPIOB_ODR               (PIN_ODR_HIGH(GPIOB_USB_FS_BUSON) |     \
+#define VAL_GPIOB_ODR               (PIN_ODR_LOW(GPIOB_USB_FS_BUSON) |      \
                                      PIN_ODR_HIGH(GPIOB_USB_HS_FAULT) |     \
                                      PIN_ODR_HIGH(GPIOB_BOOT1) |            \
                                      PIN_ODR_HIGH(GPIOB_JTAG_TDO) |         \
diff --git a/firmware/chibios/boards/OLIMEX_STM32_E407/cfg/board.chcfg b/firmware/chibios/boards/OLIMEX_STM32_E407/cfg/board.chcfg
index a425b21733..ba830a8df3 100644
--- a/firmware/chibios/boards/OLIMEX_STM32_E407/cfg/board.chcfg
+++ b/firmware/chibios/boards/OLIMEX_STM32_E407/cfg/board.chcfg
@@ -49,7 +49,7 @@
             <pin7 ID="ETH_RMII_CRS_DV" Type="PushPull" Speed="Maximum"
                 Resistor="Floating" Level="High" Mode="Alternate" Alternate="11" />
             <pin8 ID="USB_HS_BUSON" Type="PushPull" Speed="Maximum"
-                Resistor="Floating" Level="High" Mode="Output" Alternate="0" />
+                Resistor="Floating" Level="Low" Mode="Output" Alternate="0" />
             <pin9 ID="OTG_FS_VBUS" Type="PushPull" Speed="Maximum" Resistor="PullDown"
                 Level="High" Mode="Input" Alternate="0" />
             <pin10 ID="OTG_FS_ID" Type="PushPull" Speed="Maximum" Resistor="Floating"
@@ -67,7 +67,7 @@
         </GPIOA>
         <GPIOB>
             <pin0 ID="USB_FS_BUSON" Type="PushPull" Speed="Maximum"
-                Resistor="Floating" Level="High" Mode="Output" Alternate="0" />
+                Resistor="Floating" Level="Low" Mode="Output" Alternate="0" />
             <pin1 ID="USB_HS_FAULT" Type="PushPull" Speed="Maximum"
                 Resistor="Floating" Level="High" Mode="Input" Alternate="0" />
             <pin2 ID="BOOT1" Type="PushPull" Speed="Maximum" Resistor="Floating"
diff --git a/firmware/controllers/engine_controller.cpp b/firmware/controllers/engine_controller.cpp
index b689444483..1fe5df8267 100644
--- a/firmware/controllers/engine_controller.cpp
+++ b/firmware/controllers/engine_controller.cpp
@@ -201,6 +201,7 @@ static void cylinderCleanupControl(Engine *engine) {
 static LocalVersionHolder versionForConfigurationListeners;
 
 static void onEvenyGeneralMilliseconds(Engine *engine) {
+	efiAssertVoid(getRemainingStack(chThdSelf()) > 64, "lowStckOnEv");
 #if EFI_PROD_CODE
 	/**
 	 * We need to push current value into the 64 bit counter often enough so that we do not miss an overflow