diff --git a/poetry/core/masonry/builders/builder.py b/poetry/core/masonry/builders/builder.py
index bb5988a26..9cc702458 100644
--- a/poetry/core/masonry/builders/builder.py
+++ b/poetry/core/masonry/builders/builder.py
@@ -96,7 +96,7 @@ def find_excluded_files(self):  # type: () -> Set[str]
 
             explicitely_excluded = set()
             for excluded_glob in self._package.exclude:
-                for excluded in self._path.glob(excluded_glob):
+                for excluded in self._path.glob(str(excluded_glob)):
                     explicitely_excluded.add(
                         Path(excluded).relative_to(self._path).as_posix()
                     )
diff --git a/tests/masonry/builders/fixtures/complete/pyproject.toml b/tests/masonry/builders/fixtures/complete/pyproject.toml
index 13834964e..d6455b7dd 100644
--- a/tests/masonry/builders/fixtures/complete/pyproject.toml
+++ b/tests/masonry/builders/fixtures/complete/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
 ]
 
 exclude = [
+    "does-not-exist",
     "**/*.xml"
 ]