diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -3077,6 +3077,7 @@ STR_NEWGRF_ERROR_LOAD_BEFORE            
 STR_NEWGRF_ERROR_LOAD_AFTER                                     :{STRING} must be loaded after {STRING}.
 STR_NEWGRF_ERROR_OTTD_VERSION_NUMBER                            :{STRING} requires OpenTTD version {STRING} or better.
 STR_NEWGRF_ERROR_AFTER_TRANSLATED_FILE                          :the GRF file it was designed to translate
+STR_NEWGRF_ERROR_TOO_MANY_NEWGRFS_LOADED                        :Too many NewGRFs are loaded.
 
 STR_NEWGRF_ADD                                                  :{BLACK}Add
 STR_NEWGRF_ADD_TIP                                              :{BLACK}Add a NewGRF file to the list