diff --git a/argparse_test.go b/argparse_test.go
index 054117a..fcbd96a 100644
--- a/argparse_test.go
+++ b/argparse_test.go
@@ -727,7 +727,7 @@ func TestIntFailSimple1(t *testing.T) {
 	i1 := p.Int("f", "flag-arg1", nil)
 
 	err := p.Parse(testArgs)
-	errStr := "[-f|--flag-arg1] bad interger value [string]"
+	errStr := "[-f|--flag-arg1] bad integer value [string]"
 	if err == nil || err.Error() != errStr {
 		t.Errorf("Test %s expected [%s], got [%+v]", t.Name(), errStr, err)
 		return
@@ -1155,7 +1155,7 @@ func TestIntListTypeFail(t *testing.T) {
 	p.IntList("f", "flag-arg1", nil)
 
 	err := p.Parse(testArgs)
-	failureText := "[-f|--flag-arg1] bad interger value [=10]"
+	failureText := "[-f|--flag-arg1] bad integer value [=10]"
 	if err == nil || err.Error() != failureText {
 		t.Errorf("Test %s failed: expected error: [%s], got error: [%+v]", t.Name(), failureText, err)
 	}
diff --git a/argument.go b/argument.go
index 01bec7c..24ab16c 100644
--- a/argument.go
+++ b/argument.go
@@ -168,7 +168,7 @@ func (o *arg) parseInt(args []string, argCount int) error {
 	default:
 		val, err := strconv.Atoi(args[0])
 		if err != nil {
-			return fmt.Errorf("[%s] bad interger value [%s]", o.name(), args[0])
+			return fmt.Errorf("[%s] bad integer value [%s]", o.name(), args[0])
 		}
 		*o.result.(*int) = val
 	}
@@ -273,7 +273,7 @@ func (o *arg) parseIntList(args []string) error {
 
 	val, err := strconv.Atoi(args[0])
 	if err != nil {
-		return fmt.Errorf("[%s] bad interger value [%s]", o.name(), args[0])
+		return fmt.Errorf("[%s] bad integer value [%s]", o.name(), args[0])
 	}
 	*o.result.(*[]int) = append(*o.result.(*[]int), val)
 	o.parsed = true