diff --git a/driver/main.c b/driver/main.c
index af1470b8d7..0e51e2b52a 100644
--- a/driver/main.c
+++ b/driver/main.c
@@ -1652,6 +1652,8 @@ static inline int drop_nostate_event(ppm_event_code event_type,
 #elif (LINUX_VERSION_CODE < KERNEL_VERSION(6, 10, 0))
 		    !fd_is_open(close_fd, fdt)
 #else
+  	            // fd_is_open() was made file-local:
+  		    // https://github.com/torvalds/linux/commit/c4aab26253cd1f302279b8d6b5b66ccf1b120520
 		    !test_bit(close_fd, fdt->open_fds)
 #endif
 			) {