diff --git a/firmware/config/boards/microrusefi/openblt/board.mk b/firmware/config/boards/microrusefi/openblt/board.mk
index 12f90fceae..8ff5811e79 100644
--- a/firmware/config/boards/microrusefi/openblt/board.mk
+++ b/firmware/config/boards/microrusefi/openblt/board.mk
@@ -8,7 +8,7 @@ PROJ_FILES += $(filter-out $(OPENBLT_BOARD_DIR)/flash_layout.c, $(call rwildcard
 #|--------------------------------------------------------------------------------------|
 #| Options for toolchain binaries                                                       |
 #|--------------------------------------------------------------------------------------|
-BRDFLAGS    = -DSTM32F429xx -DHSE_VALUE=8000000
+BRDFLAGS    = -DSTM32F429xx
 
 #|--------------------------------------------------------------------------------------|
 #| Specify library files                                                                |
diff --git a/firmware/config/boards/proteus/openblt/board.mk b/firmware/config/boards/proteus/openblt/board.mk
index 7708da28fa..5b728a03f5 100644
--- a/firmware/config/boards/proteus/openblt/board.mk
+++ b/firmware/config/boards/proteus/openblt/board.mk
@@ -18,8 +18,6 @@ else ifeq ($(PROJECT_CPU),ARCH_STM32H7)
 	BRDFLAGS     = -DSTM32H743xx
 endif
 
-BRDFLAGS    += -DHSE_VALUE=8000000
-
 #|--------------------------------------------------------------------------------------|
 #| Specify library files                                                                |
 #|--------------------------------------------------------------------------------------|
diff --git a/firmware/openblt.mk b/firmware/openblt.mk
index d0c1b51eeb..efa43fafd5 100644
--- a/firmware/openblt.mk
+++ b/firmware/openblt.mk
@@ -72,6 +72,8 @@ PROJ_FILES=
 include $(OPENBLT_PORT_DIR)/port.mk
 include $(OPENBLT_BOARD_DIR)/board.mk
 
+BRDFLAGS    += -DHSE_VALUE=8000000
+
 #|--------------------------------------------------------------------------------------|
 #| Collect bootloader core files                                                        |
 #|--------------------------------------------------------------------------------------|