diff --git a/arch/um/include/sysdep-i386/thread.h b/arch/um/include/sysdep-i386/thread.h
index e2bd6bae8b8aea0142d8fddb7eed0efe8cfcf672..243fed44d780693ca0c0e374605443ac1ef53742 100644
--- a/arch/um/include/sysdep-i386/thread.h
+++ b/arch/um/include/sysdep-i386/thread.h
@@ -4,7 +4,7 @@
 #include <kern_constants.h>
 
 #define TASK_DEBUGREGS(task) ((unsigned long *) &(((char *) (task))[HOST_TASK_DEBUGREGS]))
-#ifdef CONFIG_MODE_TT
+#ifdef UML_CONFIG_MODE_TT
 #define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID]))
 #endif
 
diff --git a/arch/um/include/sysdep-x86_64/thread.h b/arch/um/include/sysdep-x86_64/thread.h
index 6a76a7f3683ff1a821a59101c8162058b339b677..cbef3e1697f41f444fa61dc1bf17e039ee43abc7 100644
--- a/arch/um/include/sysdep-x86_64/thread.h
+++ b/arch/um/include/sysdep-x86_64/thread.h
@@ -3,7 +3,7 @@
 
 #include <kern_constants.h>
 
-#ifdef CONFIG_MODE_TT
+#ifdef UML_CONFIG_MODE_TT
 #define TASK_EXTERN_PID(task) *((int *) &(((char *) (task))[HOST_TASK_EXTERN_PID]))
 #endif