diff --git a/src/numex.h b/src/numex.h
index 7c2cebbb..43200ad3 100644
--- a/src/numex.h
+++ b/src/numex.h
@@ -23,6 +23,8 @@ extern "C" {
 
 #define DEFAULT_NUMEX_PATH LIBPOSTAL_DATA_DIR PATH_SEPARATOR "numex" PATH_SEPARATOR "numex.dat"
 
+#define LATIN_LANGUAGE_CODE "la"
+
 #define GENDER_MASCULINE_PREFIX "m"
 #define GENDER_FEMININE_PREFIX "f"
 #define GENDER_NEUTER_PREFIX "n"