diff --git a/ocr-service/spell_check.py b/ocr-service/spell_check.py
index 2088cd41..8b0bf4d7 100644
--- a/ocr-service/spell_check.py
+++ b/ocr-service/spell_check.py
@@ -107,7 +107,7 @@ def correct_text(text: str) -> str:
             continue
 
         correction = _spell.correction(word)
-        if correction and _spell.word_frequency[correction] > 50:
+        if correction and _spell.word_frequency[correction] > 50:  # strict > avoids non-determinism when candidates tie at the frequency floor
             if word[0].isupper() and not correction[0].isupper():
                 correction = correction.capitalize()
             checked.append(leading + correction + CORRECTION_MARKER + trailing)