diff --git a/tools/testing/selftests/vm/gup_test.c b/tools/testing/selftests/vm/gup_test.c
index 593262555e18ceae818f1c287c0aaf1f6b44dd33..6bb36ca71cb5074a58fce72fa121de62d26f055f 100644
--- a/tools/testing/selftests/vm/gup_test.c
+++ b/tools/testing/selftests/vm/gup_test.c
@@ -21,6 +21,8 @@
 #define FOLL_WRITE	0x01	/* check pte is writable */
 #define FOLL_TOUCH	0x02	/* mark page accessed */
 
+#define GUP_TEST_FILE "/sys/kernel/debug/gup_test"
+
 static unsigned long cmd = GUP_FAST_BENCHMARK;
 static int gup_fd, repeats = 1;
 static unsigned long size = 128 * MB;