diff --git a/build/jam/board/raspberry_pi/BoardSetup b/build/jam/board/raspberry_pi/BoardSetup
index 5ecce07b70..a2601d7ace 100644
--- a/build/jam/board/raspberry_pi/BoardSetup
+++ b/build/jam/board/raspberry_pi/BoardSetup
@@ -2,6 +2,10 @@
 
 HAIKU_BOARD_DESCRIPTION = "Raspberry Pi" ;
 
+# must force both since they are set before this file is read.
+HAIKU_BOOT_PLATFORM = raspberrypi_arm ;
+TARGET_BOOT_PLATFORM = raspberrypi_arm ;
+
 #
 # Various hardcoded addresses
 #