diff --git a/NEWS b/NEWS
index 5bfe01b3a0..3f9f620850 100644
--- a/NEWS
+++ b/NEWS
@@ -59,6 +59,10 @@ with all sufficient information, see the ChangeLog file or Redmine
     of #coerce. Return nil in #coerce if the coercion is impossible.
     [Feature #7688]
 
+* Process
+
+  * Precision of Process.times is improved if getrusage(2) exists. [Feature #11952]
+
 * Range
   * Range#initialize no longer rescue exceptions when comparing begin and
     end with #<=> and raise a "bad value for range" ArgumentError
diff --git a/process.c b/process.c
index c8964dff69..67f51db847 100644
--- a/process.c
+++ b/process.c
@@ -6887,15 +6887,26 @@ get_clk_tck(void)
 VALUE
 rb_proc_times(VALUE obj)
 {
+    VALUE utime, stime, cutime, cstime, ret;
+#if defined(RUSAGE_SELF) && defined(RUSAGE_CHILDREN)
+    struct rusage usage_s, usage_c;
+
+    if (getrusage(RUSAGE_SELF, &usage_s) != 0 || getrusage(RUSAGE_CHILDREN, &usage_c) != 0)
+	rb_sys_fail("getrusage");
+    utime = DBL2NUM((double)usage_s.ru_utime.tv_sec + (double)usage_s.ru_utime.tv_usec/1e6);
+    stime = DBL2NUM((double)usage_s.ru_stime.tv_sec + (double)usage_s.ru_stime.tv_usec/1e6);
+    cutime = DBL2NUM((double)usage_c.ru_utime.tv_sec + (double)usage_c.ru_utime.tv_usec/1e6);
+    cstime = DBL2NUM((double)usage_c.ru_stime.tv_sec + (double)usage_c.ru_stime.tv_usec/1e6);
+#else
     const double hertz = get_clk_tck();
     struct tms buf;
-    VALUE utime, stime, cutime, cstime, ret;
 
     times(&buf);
     utime = DBL2NUM(buf.tms_utime / hertz);
     stime = DBL2NUM(buf.tms_stime / hertz);
     cutime = DBL2NUM(buf.tms_cutime / hertz);
     cstime = DBL2NUM(buf.tms_cstime / hertz);
+#endif
     ret = rb_struct_new(rb_cProcessTms, utime, stime, cutime, cstime);
     RB_GC_GUARD(utime);
     RB_GC_GUARD(stime);