Change check for a four-byte type back to hexadecimal.
diff --git a/zconf.h b/zconf.h
index 80de2ce..7a9d8f2 100644
--- a/zconf.h
+++ b/zconf.h
@@ -393,11 +393,11 @@
#if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
# include <limits.h>
-# if (UINT_MAX == 4294967295)
+# if (UINT_MAX == 0xffffffffUL)
# define Z_U4 unsigned
-# elif (ULONG_MAX == 4294967295)
+# elif (ULONG_MAX == 0xffffffffUL)
# define Z_U4 unsigned long
-# elif (USHRT_MAX == 4294967295)
+# elif (USHRT_MAX == 0xffffffffUL)
# define Z_U4 unsigned short
# endif
#endif
diff --git a/zconf.h.cmakein b/zconf.h.cmakein
index a02281a..10e445f 100644
--- a/zconf.h.cmakein
+++ b/zconf.h.cmakein
@@ -395,11 +395,11 @@
#if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
# include <limits.h>
-# if (UINT_MAX == 4294967295)
+# if (UINT_MAX == 0xffffffffUL)
# define Z_U4 unsigned
-# elif (ULONG_MAX == 4294967295)
+# elif (ULONG_MAX == 0xffffffffUL)
# define Z_U4 unsigned long
-# elif (USHRT_MAX == 4294967295)
+# elif (USHRT_MAX == 0xffffffffUL)
# define Z_U4 unsigned short
# endif
#endif
diff --git a/zconf.h.in b/zconf.h.in
index 80de2ce..7a9d8f2 100644
--- a/zconf.h.in
+++ b/zconf.h.in
@@ -393,11 +393,11 @@
#if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
# include <limits.h>
-# if (UINT_MAX == 4294967295)
+# if (UINT_MAX == 0xffffffffUL)
# define Z_U4 unsigned
-# elif (ULONG_MAX == 4294967295)
+# elif (ULONG_MAX == 0xffffffffUL)
# define Z_U4 unsigned long
-# elif (USHRT_MAX == 4294967295)
+# elif (USHRT_MAX == 0xffffffffUL)
# define Z_U4 unsigned short
# endif
#endif