diff --git a/linux-user/syscall-defs.h b/linux-user/syscall-defs.h
index 67c908448d..8b2d95d19e 100644
--- a/linux-user/syscall-defs.h
+++ b/linux-user/syscall-defs.h
@@ -59,6 +59,14 @@ SYSCALL_DEF(futimesat, ARG_ATDIRFD, ARG_STR, ARG_PTR);
 #ifdef TARGET_NR_fork
 SYSCALL_DEF(fork);
 #endif
+#ifdef TARGET_NR_ftruncate
+SYSCALL_DEF(ftruncate, ARG_DEC, ARG_DEC);
+#endif
+#ifdef TARGET_NR_ftruncate64
+SYSCALL_DEF_FULL(ftruncate64, .impl = impl_ftruncate,
+                 .args = args_ftruncate64_truncate64,
+                 .arg_type = { ARG_DEC, ARG_DEC64 });
+#endif
 #ifdef TARGET_NR_gethostname
 SYSCALL_DEF(gethostname, ARG_PTR, ARG_DEC);
 #endif
@@ -292,6 +300,14 @@ SYSCALL_DEF(syncfs, ARG_DEC);
 SYSCALL_DEF(time, ARG_PTR);
 #endif
 SYSCALL_DEF(times, ARG_PTR);
+#ifdef TARGET_NR_truncate
+SYSCALL_DEF(truncate, ARG_STR, ARG_DEC);
+#endif
+#ifdef TARGET_NR_truncate64
+SYSCALL_DEF_FULL(truncate64, .impl = impl_truncate,
+                 .args = args_ftruncate64_truncate64,
+                 .arg_type = { ARG_STR, ARG_DEC64 });
+#endif
 SYSCALL_DEF(umask, ARG_OCT);
 #ifdef TARGET_NR_umount
 SYSCALL_DEF(umount, ARG_STR);
diff --git a/linux-user/syscall-file.inc.c b/linux-user/syscall-file.inc.c
index bdf42ad437..7697cb304a 100644
--- a/linux-user/syscall-file.inc.c
+++ b/linux-user/syscall-file.inc.c
@@ -182,6 +182,25 @@ SYSCALL_IMPL(fchmodat)
     return do_fchmodat(arg1, arg2, arg3);
 }
 
+#ifdef TARGET_NR_ftruncate64
+# if TARGET_ABI_BITS == 32
+SYSCALL_ARGS(ftruncate64_truncate64)
+{
+    /* We have already assigned out[0].  */
+    int off = regpairs_aligned(cpu_env, TARGET_NR_ftruncate64);
+    out[1] = target_offset64(in[1 + off], in[2 + off]);
+    return def;
+}
+# else
+#  define args_ftruncate64_truncate64 NULL
+# endif
+#endif
+
+SYSCALL_IMPL(ftruncate)
+{
+    return get_errno(ftruncate(arg1, arg2));
+}
+
 #ifdef TARGET_NR_futimesat
 SYSCALL_IMPL(futimesat)
 {
@@ -1319,6 +1338,19 @@ SYSCALL_IMPL(syncfs)
     return get_errno(syncfs(arg1));
 }
 
+SYSCALL_IMPL(truncate)
+{
+    char *p = lock_user_string(arg1);
+    abi_long ret;
+
+    if (!p) {
+        return -TARGET_EFAULT;
+    }
+    ret = get_errno(truncate(p, arg2));
+    unlock_user(p, arg1, 0);
+    return ret;
+}
+
 static abi_long do_umount2(abi_ulong target_path, int flags)
 {
     char *p = lock_user_string(target_path);
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 80e8b360a9..1b1d44bf32 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3721,20 +3721,6 @@ static inline abi_long target_truncate64(void *cpu_env, const char *arg1,
 }
 #endif
 
-#ifdef TARGET_NR_ftruncate64
-static inline abi_long target_ftruncate64(void *cpu_env, abi_long arg1,
-                                          abi_long arg2,
-                                          abi_long arg3,
-                                          abi_long arg4)
-{
-    if (regpairs_aligned(cpu_env, TARGET_NR_ftruncate64)) {
-        arg2 = arg3;
-        arg3 = arg4;
-    }
-    return get_errno(ftruncate64(arg1, target_offset64(arg2, arg3)));
-}
-#endif
-
 static inline abi_long target_to_host_timespec(struct timespec *host_ts,
                                                abi_ulong target_addr)
 {
@@ -4158,18 +4144,6 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
     void *p;
 
     switch(num) {
-#ifdef TARGET_NR_truncate
-    case TARGET_NR_truncate:
-        if (!(p = lock_user_string(arg1)))
-            return -TARGET_EFAULT;
-        ret = get_errno(truncate(p, arg2));
-        unlock_user(p, arg1, 0);
-        return ret;
-#endif
-#ifdef TARGET_NR_ftruncate
-    case TARGET_NR_ftruncate:
-        return get_errno(ftruncate(arg1, arg2));
-#endif
     case TARGET_NR_getpriority:
         /* Note that negative values are valid for getpriority, so we must
            differentiate based on errno settings.  */
@@ -5371,18 +5345,6 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
         return ret;
     }
 #endif
-#ifdef TARGET_NR_truncate64
-    case TARGET_NR_truncate64:
-        if (!(p = lock_user_string(arg1)))
-            return -TARGET_EFAULT;
-	ret = target_truncate64(cpu_env, p, arg2, arg3, arg4);
-        unlock_user(p, arg1, 0);
-        return ret;
-#endif
-#ifdef TARGET_NR_ftruncate64
-    case TARGET_NR_ftruncate64:
-        return target_ftruncate64(cpu_env, arg1, arg2, arg3, arg4);
-#endif
 #ifdef TARGET_NR_stat64
     case TARGET_NR_stat64:
         if (!(p = lock_user_string(arg1))) {
diff --git a/linux-user/strace.list b/linux-user/strace.list
index 3326541f17..55b617239c 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -193,12 +193,6 @@
 #ifdef TARGET_NR_ftime
 { TARGET_NR_ftime, "ftime" , NULL, NULL, NULL },
 #endif
-#ifdef TARGET_NR_ftruncate
-{ TARGET_NR_ftruncate, "ftruncate" , NULL, NULL, NULL },
-#endif
-#ifdef TARGET_NR_ftruncate64
-{ TARGET_NR_ftruncate64, "ftruncate64" , NULL, NULL, NULL },
-#endif
 #ifdef TARGET_NR_futex
 { TARGET_NR_futex, "futex" , NULL, print_futex, NULL },
 #endif
@@ -1173,12 +1167,6 @@
 #ifdef TARGET_NR_tkill
 { TARGET_NR_tkill, "tkill" , NULL, print_tkill, NULL },
 #endif
-#ifdef TARGET_NR_truncate
-{ TARGET_NR_truncate, "truncate" , NULL, NULL, NULL },
-#endif
-#ifdef TARGET_NR_truncate64
-{ TARGET_NR_truncate64, "truncate64" , NULL, NULL, NULL },
-#endif
 #ifdef TARGET_NR_tuxcall
 { TARGET_NR_tuxcall, "tuxcall" , NULL, NULL, NULL },
 #endif
