diff --git a/ini/stm32f4.ini b/ini/stm32f4.ini
index 325dc4b50..62038332b 100644
--- a/ini/stm32f4.ini
+++ b/ini/stm32f4.ini
@@ -282,7 +282,7 @@ board_build.firmware = Lerdge_X_firmware_force.bin
 platform          = ${env:LERDGEX.platform}
 extends           = env:LERDGEX
 platform_packages = ${stm_flash_drive.platform_packages}
-build_flags       = ${stm_flash_drive.build_flags}
+build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 
 #
 # Lerdge S
@@ -299,7 +299,7 @@ board_build.firmware = Lerdge_firmware_force.bin
 platform          = ${env:LERDGES.platform}
 extends           = env:LERDGES
 platform_packages = ${stm_flash_drive.platform_packages}
-build_flags       = ${stm_flash_drive.build_flags}
+build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 
 #
 # Lerdge K
@@ -317,7 +317,7 @@ build_flags          = ${lerdge_common.build_flags} -DLERDGEK
 platform          = ${env:LERDGEK.platform}
 extends           = env:LERDGEK
 platform_packages = ${stm_flash_drive.platform_packages}
-build_flags       = ${stm_flash_drive.build_flags}
+build_flags       = ${stm_flash_drive.build_flags} ${lerdge_common.build_flags}
 
 #
 # RUMBA32