diff --git a/src/blenderbim/blenderbim/tool/ifc.py b/src/blenderbim/blenderbim/tool/ifc.py
index 616540edaf..36ab2f22c5 100644
--- a/src/blenderbim/blenderbim/tool/ifc.py
+++ b/src/blenderbim/blenderbim/tool/ifc.py
@@ -103,7 +103,7 @@ class Ifc(blenderbim.core.tool.Ifc):
         ifc_path = cls.get_path()
         if os.path.isfile(ifc_path):
             ifc_path = os.path.dirname(ifc_path)
-        return uri if not uri or os.path.isabs(uri) else os.path.join(ifc_path, uri)
+        return (uri if not uri or os.path.isabs(uri) else os.path.join(ifc_path, uri)).replace("\\", "/")
 
     @classmethod
     def get_relative_uri(cls, uri):
@@ -112,7 +112,7 @@ class Ifc(blenderbim.core.tool.Ifc):
         ifc_path = cls.get_path()
         if os.path.isfile(ifc_path):
             ifc_path = os.path.dirname(ifc_path)
-        return os.path.relpath(uri, ifc_path)
+        return os.path.relpath(uri, ifc_path).replace("\\", "/")
 
     @classmethod
     def unlink(cls, element=None, obj=None):