diff --git a/src/light.c b/src/light.c
index 574665fa9..93f7ea50a 100644
--- a/src/light.c
+++ b/src/light.c
@@ -1,4 +1,4 @@
-/* NetHack 3.7	light.c	$NHDT-Date: 1726609514 2024/09/17 21:45:14 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.75 $ */
+/* NetHack 3.7	light.c	$NHDT-Date: 1773375430 2026/03/12 20:17:10 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.82 $ */
 /* Copyright (c) Dean Luick, 1994                                       */
 /* NetHack may be freely redistributed.  See license for details.       */
 
@@ -974,9 +974,12 @@ wiz_light_sources(void)
     return ECMD_OK;
 }
 #endif /* !SFCTOOL */
+
 /* for 'onefile' processing where end of this file isn't necessarily the
    end of the source code seen by the compiler */
 #undef LSF_SHOW
 #undef LSF_NEEDS_FIXUP
+#undef LSF_IS_PROBLEMATIC
 #undef mon_is_local
+
 /*light.c*/