diff --git a/fixtures.ttar b/fixtures.ttar
index e7d35069c..ce74c4f3a 100644
--- a/fixtures.ttar
+++ b/fixtures.ttar
@@ -589,7 +589,7 @@ SymlinkTo: /does/not/exist
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26232/stat
 Lines: 1
-33 (ata_sff) S 2 0 0 0 -1 69238880 0 0 0 0 0 0 0 0 0 -20 1 0 5 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 1 0 0 0 0 0 0 0 0 0 0 0 0 0
+33 (ata_sff) S 2 0 0 0 -1 69238880 0 0 0 0 0 0 -9223372036854775808 9223372036854775807 0 -20 1 0 5 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 -9223372036854775808 9223372036854775807 0 0 0 0 0 0 0 0 0 0 0 0 0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26232/wchan
diff --git a/proc_stat.go b/proc_stat.go
index 8c7b6e80a..ad03d85ef 100644
--- a/proc_stat.go
+++ b/proc_stat.go
@@ -81,10 +81,10 @@ type ProcStat struct {
 	STime uint
 	// Amount of time that this process's waited-for children have been
 	// scheduled in user mode, measured in clock ticks.
-	CUTime uint
+	CUTime int
 	// Amount of time that this process's waited-for children have been
 	// scheduled in kernel mode, measured in clock ticks.
-	CSTime uint
+	CSTime int
 	// For processes running a real-time scheduling policy, this is the negated
 	// scheduling priority, minus one.
 	Priority int
@@ -141,6 +141,11 @@ func (p Proc) Stat() (ProcStat, error) {
 	}
 
 	s.Comm = string(data[l+1 : r])
+
+	// Check the following resources for the details about the particular stat
+	// fields and their data types:
+	// * https://man7.org/linux/man-pages/man5/proc.5.html
+	// * https://man7.org/linux/man-pages/man3/scanf.3.html
 	_, err = fmt.Fscan(
 		bytes.NewBuffer(data[r+2:]),
 		&s.State,
diff --git a/proc_stat_test.go b/proc_stat_test.go
index 53491050e..8be1e1318 100644
--- a/proc_stat_test.go
+++ b/proc_stat_test.go
@@ -14,6 +14,7 @@
 package procfs
 
 import (
+	"math"
 	"os"
 	"testing"
 )
@@ -76,16 +77,30 @@ func TestProcStat(t *testing.T) {
 	}
 }
 
-func TestProcStatIgnored(t *testing.T) {
+func TestProcStatLimits(t *testing.T) {
 	p, err := getProcFixtures(t).Proc(26232)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	_, err = p.Stat()
+	s, err := p.Stat()
 	if err != nil {
 		t.Errorf("want not error, have %s", err)
 	}
+
+	// max values of stat int fields
+	for _, test := range []struct {
+		name string
+		want int
+		have int
+	}{
+		{name: "waited for children user time", want: math.MinInt64, have: s.CUTime},
+		{name: "waited for children system time", want: math.MaxInt64, have: s.CSTime},
+	} {
+		if test.want != test.have {
+			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)
+		}
+	}
 }
 
 func TestProcStatComm(t *testing.T) {