diff --git a/hugolib/pagesfromdata/pagesfromgotmpl.go b/hugolib/pagesfromdata/pagesfromgotmpl.go
index c2214cdca..bf7b7f633 100644
--- a/hugolib/pagesfromdata/pagesfromgotmpl.go
+++ b/hugolib/pagesfromdata/pagesfromgotmpl.go
@@ -17,7 +17,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"path/filepath"
 
 	"github.com/gohugoio/hugo/common/hashing"
 	"github.com/gohugoio/hugo/common/hmaps"
@@ -346,7 +345,7 @@ func (p *PagesFromTemplate) Execute(ctx context.Context) (BuildInfo, error) {
 	}
 	defer f.Close()
 
-	tmpl, err := p.TemplateStore.TextParse(filepath.ToSlash(p.GoTmplFi.Meta().Filename), helpers.ReaderToString(f))
+	tmpl, err := p.TemplateStore.TextParse(p.GoTmplFi.Meta().PathInfo.Path(), helpers.ReaderToString(f))
 	if err != nil {
 		return BuildInfo{}, err
 	}
diff --git a/hugolib/pagesfromdata/pagesfromgotmpl_integration_test.go b/hugolib/pagesfromdata/pagesfromgotmpl_integration_test.go
index f0bdb1548..958e6451f 100644
--- a/hugolib/pagesfromdata/pagesfromgotmpl_integration_test.go
+++ b/hugolib/pagesfromdata/pagesfromgotmpl_integration_test.go
@@ -14,6 +14,7 @@
 package pagesfromdata_test
 
 import (
+	"bytes"
 	"fmt"
 	"strings"
 	"testing"
@@ -923,3 +924,25 @@ iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAA
 
 	b.AssertFileContent("public/p1/index.html", "Resized: 1x1|")
 }
+
+// See https://github.com/gohugoio/hugo/issues/14999
+func TestContentAdapterTemplateMetricsRelativePath(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+templateMetrics = true
+-- layouts/all.html --
+{{ .Title }}
+-- content/docs/_content.gotmpl --
+{{ .AddPage (dict "path" "/docs/p1" "title" "P1") }}
+`
+	b := hugolib.Test(t, files)
+
+	var buf bytes.Buffer
+	b.H.Metrics.WriteMetrics(&buf)
+	got := buf.String()
+
+	b.Assert(got, qt.Contains, "/docs/_content.gotmpl")
+	b.Assert(got, qt.Not(qt.Contains), "content/docs/_content.gotmpl")
+}