diff --git a/Tests/Conformance/c26.0.1.cc b/Tests/Conformance/c26.0.1.cc
index 24cd5ab..bb9d53f 100644
--- a/Tests/Conformance/c26.0.1.cc
+++ b/Tests/Conformance/c26.0.1.cc
@@ -1,57 +1,63 @@
 /* Conformance Test 26.0.1:  Ensure can include all library header files */
 /*                           without conflicts                           */
 
-#include <ACE.H>
-#include <ADB.H>
-#include <ASSERT.H>
-#include <CONTROL.H>
-#include <CTYPE.H>
-#include <DESK.H>
-#include <DIALOG.H>
-#include <ERRNO.H>
-#include <EVENT.H>
-#include <FONT.H>
-#include <GSOS.H>
-#include <INTMATH.H>
-#include <LIMITS.H>
-#include <LINEEDIT.H>
-#include <LIST.H>
-#include <LOADER.H>
-#include <LOCATOR.H>
-#include <MATH.H>
-#include <MEMORY.H>
-#include <MENU.H>
-#include <MIDI.H>
-#include <MISCTOOL.H>
-#include <NOTESEQ.H>
-#include <NOTESYN.H>
-#include <ORCA.H>
-#include <PRINT.H>
-#include <PRODOS.H>
-#include <QDAUX.H>
-#include <QUICKDRAW.H>
-#include <SCHEDULER.H>
-#include <SCRAP.H>
-#include <SETJMP.H>
-#include <SHELL.H>
-#include <SOUND.H>
-#include <STDARG.H>
-#include <STDDEF.H>
-#include <STDFILE.H>
-#include <STDIO.H>
-#include <STDLIB.H>
-#include <STRING.H>
-#include <TEXTTOOL.H>
-#include <TIME.H>
-#include <TYPES.H>
-#include <WINDOW.H>
-#include <FLOAT.H>
-#include <FCNTL.H>
-#include <SIGNAL.H>
-#include <APPLESHARE.H>
-#include <RESOURCES.H>
-#include <TEXTEDIT.H>
-#include <VIDEO.H>
+#include <ace.h>
+#include <adb.h>
+#include <assert.h>
+#include <control.h>
+#include <ctype.h>
+#include <desk.h>
+#include <dialog.h>
+#include <errno.h>
+#include <event.h>
+#include <font.h>
+#include <gsos.h>
+#include <intmath.h>
+#include <inttypes.h>
+#include <iso646.h>
+#include <limits.h>
+#include <lineedit.h>
+#include <list.h>
+#include <loader.h>
+#include <locator.h>
+#include <math.h>
+#include <memory.h>
+#include <menu.h>
+#include <midi.h>
+#include <misctool.h>
+#include <noteseq.h>
+#include <notesyn.h>
+#include <orca.h>
+#include <print.h>
+#include <prodos.h>
+#include <qdaux.h>
+#include <quickdraw.h>
+#include <scheduler.h>
+#include <scrap.h>
+#include <setjmp.h>
+#include <shell.h>
+#include <sound.h>
+#include <stdalign.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdfile.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdnoreturn.h>
+#include <string.h>
+#include <texttool.h>
+#include <time.h>
+#include <types.h>
+#include <window.h>
+#include <float.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <appleshare.h>
+#include <resources.h>
+#include <textedit.h>
+#include <video.h>
 
 main ()
   {