diff --git a/src/numex_data.c b/src/numex_data.c
index 02691e3c..837175c8 100644
--- a/src/numex_data.c
+++ b/src/numex_data.c
@@ -5131,7 +5131,7 @@ numex_rule_t numex_rules[] = {
     {NUMEX_LEFT_CONTEXT_ADD, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_ORDINAL_RULE, GENDER_NEUTER, CATEGORY_DEFAULT, 10, 1000000000000LL},
     {NUMEX_LEFT_CONTEXT_ADD, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_ORDINAL_RULE, GENDER_NEUTER, CATEGORY_DEFAULT, 10, 1000000000000000LL},
     {NUMEX_LEFT_CONTEXT_NONE, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 0LL},
-    {NUMEX_LEFT_CONTEXT_NONE, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 0LL},
+    {NUMEX_LEFT_CONTEXT_CONCAT_ONLY_IF_NUMBER, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 0LL},
     {NUMEX_LEFT_CONTEXT_NONE, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 1LL},
     {NUMEX_LEFT_CONTEXT_NONE, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 2LL},
     {NUMEX_LEFT_CONTEXT_NONE, NUMEX_RIGHT_CONTEXT_NONE, NUMEX_CARDINAL_RULE, GENDER_NONE, CATEGORY_DEFAULT, 10, 3LL},