diff --git a/src/libespeak-ng/tr_languages.c b/src/libespeak-ng/tr_languages.c
index a4da28be..c278bb66 100644
--- a/src/libespeak-ng/tr_languages.c
+++ b/src/libespeak-ng/tr_languages.c
@@ -1638,4 +1638,5 @@ static void Translator_Russian(Translator *tr)
 
 	tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_OMIT_1_HUNDRED;
 	tr->langopts.numbers2 = NUM2_THOUSANDPLEX_VAR_THOUSANDS | NUM2_THOUSANDS_VAR1; // variant numbers before thousands
+	tr->langopts.max_digits = 18;
 }