diff --git a/arch/sim/src/nuttx-names.in b/arch/sim/src/nuttx-names.in
index 16ac0a574a4..38694ede2e0 100644
--- a/arch/sim/src/nuttx-names.in
+++ b/arch/sim/src/nuttx-names.in
@@ -141,6 +141,7 @@ NXSYMBOLS(shm_unlink)
 NXSYMBOLS(shutdown)
 NXSYMBOLS(sigaction)
 NXSYMBOLS(sigaddset)
+NXSYMBOLS(sigdelset)
 NXSYMBOLS(sigemptyset)
 NXSYMBOLS(sigfillset)
 NXSYMBOLS(sleep)