diff --git a/honeybee_schema/project_info.py b/honeybee_schema/project_info.py
index 597688d..3dc682d 100644
--- a/honeybee_schema/project_info.py
+++ b/honeybee_schema/project_info.py
@@ -51,6 +51,8 @@ class Location(BaseModel):
 class ProjectInfo(BaseModel):
     """Project information."""
 
+    type: constr(regex='^ProjectInfo$')
+
     north: float = Field(
         0,
         description='A number between -360 to 360 where positive values rotate the '