Index: usr.sbin/ntp/config.h
===================================================================
--- usr.sbin/ntp/config.h
+++ usr.sbin/ntp/config.h
@@ -1469,7 +1469,7 @@
 /* #undef SCO5_CLOCK */
 
 /* The size of `char*', as computed by sizeof. */
-#if defined(__alpha__) || defined(__sparc64__) || defined(__amd64__)
+#ifdef __LP64__
 #define SIZEOF_CHARP 8
 #else
 #define SIZEOF_CHARP 4
@@ -1479,7 +1479,7 @@
 #define SIZEOF_INT 4
 
 /* The size of `long', as computed by sizeof. */
-#if defined(__alpha__) || defined(__sparc64__) || defined(__amd64__)
+#ifdef __LP64__
 #define SIZEOF_LONG 8
 #else
 #define SIZEOF_LONG 4
@@ -1498,7 +1498,7 @@
 #define SIZEOF_SIGNED_CHAR 1
 
 /* The size of `time_t', as computed by sizeof. */
-#if defined(__alpha__) || defined(__sparc64__) || defined(__amd64__)
+#ifdef __LP64__
 #define SIZEOF_TIME_T 8
 #else
 #define SIZEOF_TIME_T 4
@@ -1534,6 +1534,24 @@
 #define STR_SYSTEM "sparc64-undermydesk-freebsd"
 #elif defined(__amd64__)
 #define STR_SYSTEM "amd64-undermydesk-freebsd"
+#elif defined(__powerpc64__)
+#define STR_SYSTEM "powerpc64-undermydesk-freebsd"
+#elif defined(__powerpc__)
+#define STR_SYSTEM "powerpc-undermydesk-freebsd"
+#elif defined(__mips64)
+#define STR_SYSTEM "mips64-undermydesk-freebsd"
+#elif defined(__mips__)
+#define STR_SYSTEM "mips-undermydesk-freebsd"
+#elif defined(__aarch64__)
+#define STR_SYSTEM "arm64-undermydesk-freebsd"
+#elif defined(__arm__)
+#define STR_SYSTEM "arm-undermydesk-freebsd"
+#elif defined(__sparc64__)
+#define STR_SYSTEM "sparc64-undermydesk-freebsd"
+#elif defined(__sparc__)
+#define STR_SYSTEM "sparc-undermydesk-freebsd"
+#elif defined(__ia64__)
+#define STR_SYSTEM "ia64-undermydesk-freebsd"
 #else
 #define STR_SYSTEM "i386-undermydesk-freebsd"
 #endif