diff --git a/LoopStructural/modelling/core/geological_model.py b/LoopStructural/modelling/core/geological_model.py
index 9dc85e80..2804f33b 100644
--- a/LoopStructural/modelling/core/geological_model.py
+++ b/LoopStructural/modelling/core/geological_model.py
@@ -1182,7 +1182,7 @@ def add_unconformity(self, feature: GeologicalFeature, value: float) -> Unconfor
                 logger.debug(f"Reached unconformity {f.name}")
                 break
             logger.debug(f"Adding {uc_feature.name} as unconformity to {f.name}")
-            if f.type == FeatureType.FAULT:
+            if f.type == FeatureType.FAULT or f.type == FeatureType.INACTIVEFAULT:
                 continue
             if f == feature:
                 continue