diff --git a/src/system/libroot/os/arch/ppc/Jamfile b/src/system/libroot/os/arch/ppc/Jamfile
index d478e29411..d402589633 100644
--- a/src/system/libroot/os/arch/ppc/Jamfile
+++ b/src/system/libroot/os/arch/ppc/Jamfile
@@ -1,5 +1,8 @@
 SubDir HAIKU_TOP src system libroot os arch ppc ;
 
+UsePrivateKernelHeaders ;
+	# TODO: Replace by "UsePrivateHeaders libroot" after resolving the TODO in
+	# time.c!
 UsePrivateSystemHeaders ;
 
 MergeObject os_arch_$(TARGET_ARCH).o :