diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -2896,6 +2896,7 @@ STR_NEWGRF_APPLY_CHANGES                
 STR_NEWGRF_SET_PARAMETERS                                       :{BLACK}Set parameters
 STR_NEWGRF_TIP                                                  :{BLACK}A list of all the Newgrf sets that you have installed. Click a set to change the settings
 STR_NEWGRF_NO_FILES_INSTALLED                                   :{BLACK}There are currently no newgrf files installed! Please refer to the manual for instructions on installing new graphics
+STR_NEWGRF_ERROR_MSG                                            :{RED}{STRING}
 STR_NEWGRF_FILENAME                                             :{BLACK}Filename: {SILVER}{STRING}
 STR_NEWGRF_GRF_ID                                               :{BLACK}GRF ID: {SILVER}{STRING}
 STR_NEWGRF_MD5SUM                                               :{BLACK}MD5sum: {SILVER}{STRING}