diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 38be096e750f0ec98d4887275f9f48abc274be3b..2115b8beb54167ffe9c522a5fbe6727b1e547137 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -16,6 +16,7 @@
 #include "process.h"
 #include "kern_constants.h"
 #include "os.h"
+#include "uml-config.h"
 
 int set_interval(int is_virtual)
 {
@@ -30,7 +31,7 @@ int set_interval(int is_virtual)
 	return 0;
 }
 
-#ifdef CONFIG_MODE_TT
+#ifdef UML_CONFIG_MODE_TT
 void enable_timer(void)
 {
 	set_interval(1);