diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 7a01757b5e..6eb357fe53 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -1193,6 +1193,11 @@ static ChangeInfoResult StationChangeInfo(uint stid, int numinfo, int prop, Byte
 				byte srcid = buf->ReadByte();
 				const StationSpec *srcstatspec = _cur_grffile->stations[srcid];
 
+				if (srcstatspec == NULL) {
+					grfmsg(1, "StationChangeInfo: Station %u is not defined, cannot copy sprite layout to %u.", srcid, stid + i);
+					continue;
+				}
+
 				statspec->tiles = srcstatspec->tiles;
 				statspec->renderdata = srcstatspec->renderdata;
 				statspec->copied_renderdata = true;
@@ -1266,6 +1271,11 @@ static ChangeInfoResult StationChangeInfo(uint stid, int numinfo, int prop, Byte
 				byte srcid = buf->ReadByte();
 				const StationSpec *srcstatspec = _cur_grffile->stations[srcid];
 
+				if (srcstatspec == NULL) {
+					grfmsg(1, "StationChangeInfo: Station %u is not defined, cannot copy tile layout to %u.", srcid, stid + i);
+					continue;
+				}
+
 				statspec->lengths   = srcstatspec->lengths;
 				statspec->platforms = srcstatspec->platforms;
 				statspec->layouts   = srcstatspec->layouts;