diff -rupN --no-dereference libjpeg-turbo-2.1.0/win/jconfig.h.in libjpeg-turbo-2.1.0-new/win/jconfig.h.in
--- libjpeg-turbo-2.1.0/win/jconfig.h.in	2021-04-23 18:42:40.000000000 +0200
+++ libjpeg-turbo-2.1.0-new/win/jconfig.h.in	2021-04-26 18:21:31.722086767 +0200
@@ -9,13 +9,13 @@
 
 #define BITS_IN_JSAMPLE  @BITS_IN_JSAMPLE@      /* use 8 or 12 */
 
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
+#define HAVE_STDDEF_H 1
+#define HAVE_STDLIB_H 1
 #undef NEED_SYS_TYPES_H
 #undef NEED_BSD_STRINGS
 
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
+#define HAVE_UNSIGNED_CHAR 1
+#define HAVE_UNSIGNED_SHORT 1
 #undef INCOMPLETE_TYPES_BROKEN
 #undef RIGHT_SHIFT_IS_UNSIGNED
 
@@ -23,7 +23,7 @@
 #ifndef __RPCNDR_H__            /* don't conflict if rpcndr.h already read */
 typedef unsigned char boolean;
 #endif
-#define HAVE_BOOLEAN            /* prevent jmorecfg.h from redefining it */
+#define HAVE_BOOLEAN 1            /* prevent jmorecfg.h from redefining it */
 
 /* Define "INT32" as int, not long, per Windows custom */
 #if !(defined(_BASETSD_H_) || defined(_BASETSD_H))   /* don't conflict if basetsd.h already read */