diff --git a/platformio/package/manifest/parser.py b/platformio/package/manifest/parser.py
index aa0e1c7e..dc7265b3 100644
--- a/platformio/package/manifest/parser.py
+++ b/platformio/package/manifest/parser.py
@@ -505,7 +505,7 @@ class LibraryPropertiesManifestParser(BaseManifestParser):
                     or None
                 )
         if include:
-            result["include"] = include
+            result["include"] = [include]
         return result