diff --git a/src/system/boot/loader/Jamfile b/src/system/boot/loader/Jamfile
index d566b68b9c..b76f85493d 100644
--- a/src/system/boot/loader/Jamfile
+++ b/src/system/boot/loader/Jamfile
@@ -47,11 +47,7 @@ UsePrivateHeaders shared storage ;
 
 				#BOOT_SUPPORT_FILE_SYSTEM_FAT
 			;
-			if $(HAIKU_BOOT_PLATFORM) != efi {
-				DEFINES +=
-					BOOT_SUPPORT_ELF32
-				;
-			} else {
+			if $(HAIKU_BOOT_PLATFORM) = efi {
 				DEFINES +=
 					_BOOT_PLATFORM_EFI
 				;
@@ -59,6 +55,10 @@ UsePrivateHeaders shared storage ;
 		}
 	}
 
+	if $(HAIKU_BOOT_PLATFORM) != efi {
+		DEFINES += BOOT_SUPPORT_ELF32 ;
+	}
+
 	local kernelC++Header = [ FDirName $(HAIKU_TOP) headers private kernel util
 		kernel_cpp.h ] ;