Index: kernel/arch/amd64/src/syscall.c
===================================================================
--- kernel/arch/amd64/src/syscall.c	(revision 80c941658b6963ac942c8ada940935259b73c370)
+++ kernel/arch/amd64/src/syscall.c	(revision f2b3d3ea3dc1fbb7a2312b326613bcc88a3bfaf5)
@@ -58,6 +58,6 @@
 	 */
 	write_msr(AMD_MSR_STAR,
-	    ((uint64_t)(gdtselector(KDATA_DES) | PL_USER) << 48) |
-	    ((uint64_t)(gdtselector(KTEXT_DES) | PL_KERNEL) << 32));
+	    ((uint64_t) (GDT_SELECTOR(KDATA_DES) | PL_USER) << 48) |
+	    ((uint64_t) (GDT_SELECTOR(KTEXT_DES) | PL_KERNEL) << 32));
 	write_msr(AMD_MSR_LSTAR, (uint64_t)syscall_entry);
 	/* Mask RFLAGS on syscall