diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -665,6 +665,7 @@ STR_SMALLMAP_TOOLTIP_SHOW_TRANSPORT_ROUT
 STR_SMALLMAP_TOOLTIP_SHOW_VEGETATION_ON_MAP                     :{BLACK}Show vegetation on map
 STR_SMALLMAP_TOOLTIP_SHOW_LAND_OWNERS_ON_MAP                    :{BLACK}Show land owners on map
 STR_SMALLMAP_TOOLTIP_INDUSTRY_SELECTION                         :{BLACK}Click on an industry type to toggle displaying it. Ctrl+Click disables all types except the selected one. Ctrl+Click on it again to enable all industry types
+STR_SMALLMAP_TOOLTIP_COMPANY_SELECTION                          :{BLACK}Click on a company to toggle displaying its property. Ctrl+Click disables all companies except the selected one. Ctrl+Click on it again to enable all companies
 
 STR_SMALLMAP_LEGENDA_ROADS                                      :{TINYFONT}{BLACK}Roads
 STR_SMALLMAP_LEGENDA_RAILROADS                                  :{TINYFONT}{BLACK}Railways