diff --git a/src/config.h b/src/config.h
index f0ac4299..49d5082c 100644
--- a/src/config.h
+++ b/src/config.h
@@ -6,6 +6,7 @@
 #define LIBPOSTAL_DATA_DIR ".." PATH_SEPARATOR "data"
 
 #define LIBPOSTAL_DICTIONARIES_DIR LIBPOSTAL_DATA_DIR PATH_SEPARATOR "dictionaries"
+#define LIBPOSTAL_GEONAMES_DIR LIBPOSTAL_DATA_DIR PATH_SEPARATOR "geonames"
 #define LIBPOSTAL_GEODB_DIR LIBPOSTAL_DATA_DIR PATH_SEPARATOR "geodb"
 
 #endif
\ No newline at end of file