diff --git a/bin/nproc/nproc.c b/bin/nproc/nproc.c
index c2ab75826ce1..d8affe11b796 100644
--- a/bin/nproc/nproc.c
+++ b/bin/nproc/nproc.c
@@ -94,7 +94,7 @@ main(int argc, char *argv[])
 			break;
 		case OPT_VERSION:
 			version();
-			__builtin_unreachable();
+			__unreachable();
 		case OPT_HELP:
 			help();
 			exit(EXIT_SUCCESS);