diff -ur file-4.15.old/src/readelf.c file-4.15/src/readelf.c
--- file-4.15.old/src/readelf.c	2005-07-14 04:22:25.000000000 +0200
+++ file-4.15/src/readelf.c	2005-11-05 11:15:12.000000000 +0100
@@ -352,6 +352,14 @@
 			if (file_printf(ms, "Solaris") == -1)
 				return size;
 			break;
+		case GNU_OS_KFREEBSD:
+			if (file_printf(ms, "kFreeBSD") == -1)
+				return size;
+			break;
+		case GNU_OS_KNETBSD:
+			if (file_printf(ms, "kNetBSD") == -1)
+				return size;
+			break;
 		default:
 			if (file_printf(ms, "<unknown>") == -1)
 				return size; 
diff -ur file-4.15.old/src/readelf.h file-4.15/src/readelf.h
--- file-4.15.old/src/readelf.h	2005-06-30 18:33:01.000000000 +0200
+++ file-4.15/src/readelf.h	2005-11-05 11:15:41.000000000 +0100
@@ -231,5 +231,7 @@
 #define GNU_OS_LINUX	0
 #define GNU_OS_HURD	1
 #define GNU_OS_SOLARIS	2
+#define GNU_OS_KFREEBSD	3
+#define GNU_OS_KNETBSD	4
 
 #endif