diff --git a/emmet-builders/emmet/builders/materials/elasticity.py b/emmet-builders/emmet/builders/materials/elasticity.py
index 906ad884d5..b6ef0553d7 100644
--- a/emmet-builders/emmet/builders/materials/elasticity.py
+++ b/emmet-builders/emmet/builders/materials/elasticity.py
@@ -295,7 +295,7 @@ def filter_by_incar_settings(
                 break
 
             if isinstance(incar[k], str):
-                if incar[k].lower() != v.lower():
+                if incar[k].lower() != str(v).lower():
                     ok = False
                     break