diff --git a/context.go b/context.go
index 5b8813d..55747c7 100644
--- a/context.go
+++ b/context.go
@@ -17,4 +17,5 @@ type ContextValues struct {
 	IsIndex bool
 	IndexSuffix string
 	Ext string
+	SourcePath string
 }
diff --git a/handler.go b/handler.go
index 2ef2326..588f3f9 100644
--- a/handler.go
+++ b/handler.go
@@ -77,6 +77,7 @@ func DefaultPP(mod string) *tpp.Preprocessor {
 		s.Add("__is_index__", vals.IsIndex)
 		s.Add("__index_suffix__", vals.IndexSuffix)
 		s.Add("__tpp_ext__", vals.Ext)
+		s.Add("__source_path__", vals.SourcePath)
 	}).SetPreCode(func(ctx context.Context) []byte {
 		return []byte(`
 			markdown := func(...args) {
@@ -92,6 +93,7 @@ func DefaultPP(mod string) *tpp.Preprocessor {
 			context.is_index = __is_index__
 			context.index_suffix = __index_suffix__
 			context.tpp_ext = __tpp_ext__
+			context.source_path = __source_path__
 
 			import("./pre")(context)
 		`)
@@ -171,6 +173,7 @@ func (h *Handler) ServeHTTP(
 			IsIndex: isIndex,
 			IndexSuffix: h.indexSuffix,
 			Ext: h.ext,
+			SourcePath: h.sourcePath,
 		},
 	)