diff --git a/src/Mod/Arch/ArchComponent.py b/src/Mod/Arch/ArchComponent.py
index 60c8289d3c..137612323f 100644
--- a/src/Mod/Arch/ArchComponent.py
+++ b/src/Mod/Arch/ArchComponent.py
@@ -1191,7 +1191,7 @@ class ComponentTaskPanel:
         import Arch_rc, csv, os, ArchIFCSchema
 
         # get presets
-        self.ptypes = ArchIFCSchema.IfcTypes.keys()
+        self.ptypes = list(ArchIFCSchema.IfcTypes.keys())
         self.plabels = [''.join(map(lambda x: x if x.islower() else " "+x, t[3:]))[1:] for t in self.ptypes]
         self.psetdefs = {}
         psetspath = os.path.join(FreeCAD.getResourceDir(),"Mod","Arch","Presets","pset_definitions.csv")