--- a/sys/platform/pc64/x86_64/genassym.c
+++ b/sys/platform/pc64/x86_64/genassym.c
@@ -236,6 +236,7 @@
 ASSYM(GD_SAVEFPU, offsetof(struct mdglobaldata, gd_savefpu));
 ASSYM(GD_OTHER_CPUS, offsetof(struct mdglobaldata, mi.gd_other_cpus));
 ASSYM(GD_SS_EFLAGS, offsetof(struct mdglobaldata, gd_ss_eflags));
+ASSYM(GD_CURRENTLDT, offsetof(struct mdglobaldata, gd_currentldt));
 ASSYM(GD_REQFLAGS, offsetof(struct mdglobaldata, mi.gd_reqflags));
 
 ASSYM(RQF_IPIQ, RQF_IPIQ);