diff --git a/multi/multi_error.go b/multi/multi_error.go
index f1939e7..9807179 100644
--- a/multi/multi_error.go
+++ b/multi/multi_error.go
@@ -1,6 +1,7 @@
 package multi
 
 import (
+	"errors"
 	"strings"
 
 	"github.com/upfluence/errors/base"
@@ -103,7 +104,7 @@ func ExtractErrors(err error) []error {
 
 	errs := ExtractErrors(nerr)
 
-	if len(errs) == 1 && errs[0] == nerr {
+	if len(errs) == 1 && errors.Is(errs[0], nerr) {
 		return []error{err}
 	}
 
diff --git a/multi/multi_error_test.go b/multi/multi_error_test.go
index 855912c..ad7ae5d 100644
--- a/multi/multi_error_test.go
+++ b/multi/multi_error_test.go
@@ -34,6 +34,20 @@ func TestCombining(t *testing.T) {
 			},
 			want: multi.Combine(foo, foo, foo),
 		},
+		{
+			errs: []error{
+				errors.WithStack(notComparableError{s: []string{"foo"}}),
+				errors.Combine(
+					notComparableError{s: []string{"bar"}},
+					notComparableError{s: []string{"buz"}},
+				),
+			},
+			want: multi.Combine(
+				notComparableError{s: []string{"foo"}},
+				notComparableError{s: []string{"bar"}},
+				notComparableError{s: []string{"buz"}},
+			),
+		},
 	} {
 		assert.Equal(t, tt.want, errors.Cause(errors.WrapErrors(tt.errs)))
 	}
@@ -55,3 +69,9 @@ func TestTags(t *testing.T) {
 		tags.GetTags(err),
 	)
 }
+
+type notComparableError struct {
+	s []string
+}
+
+func (notComparableError) Error() string { return "not comparable" }