diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 35f41bb19e..c5af46506e 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -2638,7 +2638,7 @@ static ChangeInfoResult IndustriesChangeInfo(uint indid, int numinfo, int prop,
 
 			case 0x24: // name for nearby station
 				indsp->station_name = buf->ReadWord();
-				_string_to_grf_mapping[&indsp->station_name] = _cur_grffile->grfid;
+				if (indsp->station_name != STR_NULL) _string_to_grf_mapping[&indsp->station_name] = _cur_grffile->grfid;
 				break;
 
 			default: