Index: usr.bin/truncate/truncate.c
===================================================================
--- usr.bin/truncate/truncate.c
+++ usr.bin/truncate/truncate.c
@@ -65,7 +65,9 @@
 	int do_refer;
 	int got_size;
 	char *fname, *rname;
+#ifdef SPACECTL_DEALLOC
 	struct spacectl_range sr;
+#endif
 
 	fd = -1;
 	rsize = tsize = sz = off = 0;
@@ -201,9 +203,14 @@
 			tsize = 0;
 
 		if (do_dealloc == 1) {
+#ifdef SPACECTL_DEALLOC
 			sr.r_offset = off;
 			sr.r_len = len;
 			r = fspacectl(fd, SPACECTL_DEALLOC, &sr, 0, &sr);
+#else
+			errno = ENODEV;
+			r = -1;
+#endif
 		}
 		if (do_truncate == 1)
 			r = ftruncate(fd, tsize);