diff --git a/mkdocs_drawio_exporter/exporter.py b/mkdocs_drawio_exporter/exporter.py
index 3fdd0b2..8407ba1 100644
--- a/mkdocs_drawio_exporter/exporter.py
+++ b/mkdocs_drawio_exporter/exporter.py
@@ -126,14 +126,14 @@ def __hash__(self):
     def __repr__(self):
         return f"Source({self.source_embed}, {self.page_index}, {self.source_rel})"
 
-    def resolve_rel_path(self, page_dest_path):
+    def resolve_rel_path(self, page_src_path):
         """Resolve the path of the source, relative to the documentation directory.
 
-        :param str page_dest_path: The destination path of the parent page.
+        :param str page_src_path: The source path of the parent page.
         """
         unescaped_source_embed = urllib.parse.unquote(self.source_embed)
         self.source_rel = os.path.normpath(os.path.join(
-                os.path.dirname(page_dest_path),
+                os.path.dirname(page_src_path),
                 unescaped_source_embed))
 
 
@@ -248,7 +248,7 @@ def validate_config(self, config: Configuration):
                     'embed_format', config['embed_format'],
                     'cannot inline content of non-SVG format')
 
-    def rewrite_image_embeds(self, page_dest_path, output_content, config: Configuration):
+    def rewrite_image_embeds(self, page_src_path, output_content, config: Configuration):
         """Rewrite image embeds.
 
         :param str page_dest_path: Destination path.
@@ -270,7 +270,7 @@ def replace(match):
 
             if fnmatch.fnmatch(filename, config['sources']):
                 source = Source(filename, page_index)
-                source.resolve_rel_path(page_dest_path)
+                source.resolve_rel_path(page_src_path)
                 content_sources.append(source)
                 img_src = f"{filename}-{page_index}.{config['format']}"
 
diff --git a/mkdocs_drawio_exporter/plugin.py b/mkdocs_drawio_exporter/plugin.py
index e1bfa67..1387d8c 100644
--- a/mkdocs_drawio_exporter/plugin.py
+++ b/mkdocs_drawio_exporter/plugin.py
@@ -55,7 +55,7 @@ def on_config(self, config, **kwargs):
 
     def on_page_markdown(self, markdown, page, **kwargs):
         output_content, content_sources = self.exporter.rewrite_image_embeds(
-                page.file.dest_path, markdown, self.config)
+                page.file.src_path, markdown, self.config)
 
         self.sources += content_sources
 
diff --git a/mkdocs_drawio_exporter/tests/exporter.py b/mkdocs_drawio_exporter/tests/exporter.py
index a6f9458..ec6dfdc 100644
--- a/mkdocs_drawio_exporter/tests/exporter.py
+++ b/mkdocs_drawio_exporter/tests/exporter.py
@@ -5,7 +5,7 @@
 import os
 from os.path import join, sep
 
-from ..exporter import Configuration, ConfigurationError, DrawIoExporter
+from ..exporter import Configuration, ConfigurationError, DrawIoExporter, Source
 
 
 class FileMock:
@@ -17,12 +17,25 @@ def __init__(self, **kwargs):
             setattr(self, attr, value)
 
 
+class SourceTests(unittest.TestCase):
+    def test_resolve_rel_path(self):
+        cases = [
+            ("dir/diagram.drawio", ("diagram.drawio", 0), "dir/page.md"),
+            ("dir1/dir2/diagram.drawio", ("diagram.drawio", 0), "dir1/dir2/index.md"),
+            ("dir1/dir2/dir3/diagram.drawio", ("diagram.drawio", 0), "dir1/dir2/dir3/index.md"),
+        ]
+        for expect, source_args, page_src_path in cases:
+            with self.subTest(expect, source_args, page_src_path):
+                source = Source(*source_args)
+                result = source.resolve_rel_path(page_src_path)
+                self.assertEqual(expect, result)
+
+
 class ExporterTests(unittest.TestCase):
     log = None
 
     def setUp(self):
         self.log = logging.getLogger(__name__)
-
     def make_exporter(self, docs_dir=None):
         if not docs_dir:
             docs_dir = sep + 'docs'