diff --git a/core/services/ocr2/plugins/ocr2keeper/evm21/encoding/interface.go b/core/services/ocr2/plugins/ocr2keeper/evm21/encoding/interface.go
index e896a144aa8..4b559e9104e 100644
--- a/core/services/ocr2/plugins/ocr2keeper/evm21/encoding/interface.go
+++ b/core/services/ocr2/plugins/ocr2keeper/evm21/encoding/interface.go
@@ -29,6 +29,7 @@ const (
 	UpkeepFailureReasonMercuryAccessNotAllowed UpkeepFailureReason = 32
 	UpkeepFailureReasonTxHashNoLongerExists    UpkeepFailureReason = 33
 	UpkeepFailureReasonInvalidRevertDataInput  UpkeepFailureReason = 34
+	UpkeepFailureReasonSimulationFailed        UpkeepFailureReason = 35
 
 	// pipeline execution error
 	NoPipelineError        PipelineExecutionState = 0
diff --git a/core/services/ocr2/plugins/ocr2keeper/evm21/registry_check_pipeline.go b/core/services/ocr2/plugins/ocr2keeper/evm21/registry_check_pipeline.go
index 9f59610f028..42f9145b3d6 100644
--- a/core/services/ocr2/plugins/ocr2keeper/evm21/registry_check_pipeline.go
+++ b/core/services/ocr2/plugins/ocr2keeper/evm21/registry_check_pipeline.go
@@ -331,6 +331,7 @@ func (r *EvmRegistry) simulatePerformUpkeeps(ctx context.Context, checkResults [
 		if !simulatePerformSuccess {
 			r.lggr.Warnf("upkeepId %s is not eligible after simulation of perform", checkResults[idx].UpkeepID.String())
 			checkResults[performToKeyIdx[i]].Eligible = false
+			checkResults[performToKeyIdx[i]].IneligibilityReason = uint8(encoding.UpkeepFailureReasonSimulationFailed)
 		}
 	}