diff --git a/src/tiararodney/sekft/eval.py b/src/tiararodney/sekft/eval.py
index 59f5bfe..5d5964c 100644
--- a/src/tiararodney/sekft/eval.py
+++ b/src/tiararodney/sekft/eval.py
@@ -80,7 +80,7 @@ def evaluate(base: str, adapter: str, scenarios_dir: Path, n: int,
     d = len(rows) or 1
     return {
         "n": len(rows),
-        "operate_rate": round(sum(t.steps > 0 and t.meta.get("clean") for t in rows) / d, 3),
+        "operate_rate": round(sum(bool(t.steps > 0 and t.meta.get("clean")) for t in rows) / d, 3),
         "terminate_rate": round(sum(t.terminal in ("exit", "panic") for t in rows) / d, 3),
         "verified_rate": round(sum(t.verified for t in rows) / d, 3),
         "clean_rate": round(sum(t.keep for t in rows) / d, 3),
diff --git a/src/tiararodney/sekft/resident.py b/src/tiararodney/sekft/resident.py
index 3b0b8e0..2d7bc3b 100644
--- a/src/tiararodney/sekft/resident.py
+++ b/src/tiararodney/sekft/resident.py
@@ -154,7 +154,7 @@ class Resident:
         d = len(rows) or 1
         m = {
             "n": len(rows),
-            "operate_rate": round(sum(t.steps > 0 and t.meta.get("clean") for t in rows) / d, 3),
+            "operate_rate": round(sum(bool(t.steps > 0 and t.meta.get("clean")) for t in rows) / d, 3),
             "terminate_rate": round(sum(t.terminal in ("exit", "panic") for t in rows) / d, 3),
             "verified_rate": round(sum(t.verified for t in rows) / d, 3),
             "clean_rate": round(sum(t.keep for t in rows) / d, 3),