diff --git a/src/kernel/libroot/os/arch/x86/Jamfile b/src/kernel/libroot/os/arch/x86/Jamfile
index 4933df4036..50be02dfe2 100644
--- a/src/kernel/libroot/os/arch/x86/Jamfile
+++ b/src/kernel/libroot/os/arch/x86/Jamfile
@@ -4,6 +4,7 @@ KernelMergeObject os_arch_$(OBOS_ARCH).o :
 	<$(SOURCE_GRIST)>atomic.S
 	<$(SOURCE_GRIST)>cpuid.S
 	<$(SOURCE_GRIST)>systeminfo.c
+	<$(SOURCE_GRIST)>system_time.S
 	<$(SOURCE_GRIST)>thread.c
 	<$(SOURCE_GRIST)>tls.c
 	:
@@ -11,7 +12,7 @@ KernelMergeObject os_arch_$(OBOS_ARCH).o :
 	;
 
 MergeObjectFromObjects kernel_os_arch_$(OBOS_ARCH).o :
-	# ToDo: remove atomic_xxx() functions from the kernel's libx86.a
-	#<$(SOURCE_GRIST)>atomic.o
+	<$(SOURCE_GRIST)>atomic.o
 	<$(SOURCE_GRIST)>cpuid.o
+	<$(SOURCE_GRIST)>system_time.o
 	;