diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
index 885da18306..6dea65f2c0 100644
--- a/src/backend/executor/execExpr.c
+++ b/src/backend/executor/execExpr.c
@@ -2950,8 +2950,10 @@ ExecBuildAggTrans(AggState *aggstate, AggStatePerPhase phase,
 				scratch.resnull = &trans_fcinfo->argnull[argno + 1];
 
 				ExprEvalPushStep(state, &scratch);
-				adjust_bailout = lappend_int(adjust_bailout,
-											 state->steps_len - 1);
+				/* don't add an adjustment unless the function is strict */
+				if (pertrans->deserialfn.fn_strict)
+					adjust_bailout = lappend_int(adjust_bailout,
+												 state->steps_len - 1);
 
 				/* restore normal settings of scratch fields */
 				scratch.resvalue = &state->resvalue;