diff --git a/radio/src/CMakeLists.txt b/radio/src/CMakeLists.txt
index e3988c7ba..f63a00225 100644
--- a/radio/src/CMakeLists.txt
+++ b/radio/src/CMakeLists.txt
@@ -146,10 +146,11 @@ endforeach()
 
 set(RTL_LANGUAGES HE)
 if(TRANSLATIONS IN_LIST RTL_LANGUAGES)
-  add_definitions(-DTRANSLATION_IS_RTL=1)
+  set(TRANSLATION_IS_RTL 1)
 else()
-  add_definitions(-DTRANSLATION_IS_RTL=0)
+  set(TRANSLATION_IS_RTL 0)
 endif()
+add_definitions(-DTRANSLATION_IS_RTL=${TRANSLATION_IS_RTL})
 
 set(SRC ${SRC} debug.cpp)
 
diff --git a/radio/src/gui/colorlcd/CMakeListsLVGL.txt b/radio/src/gui/colorlcd/CMakeListsLVGL.txt
index 112200b07..e8d54d460 100644
--- a/radio/src/gui/colorlcd/CMakeListsLVGL.txt
+++ b/radio/src/gui/colorlcd/CMakeListsLVGL.txt
@@ -40,6 +40,11 @@ set(LVGL_SOURCES_MINIMAL
   misc/lv_utils.c
 )
 
+# Add BIDI support for RTL languages (needed for bootloader LVGL draw functions)
+if(TRANSLATION_IS_RTL)
+  list(APPEND LVGL_SOURCES_MINIMAL misc/lv_bidi.c)
+endif()
+
 set(LVGL_SOURCES
   ${LVGL_SOURCES_MINIMAL}