--- a/lang/english.txt	Wed Jun 28 13:08:40 2006 +0000
+++ b/lang/english.txt	Wed Jun 28 17:33:04 2006 +0000
@@ -1159,7 +1159,7 @@
 STR_TREES_RANDOM_TYPE_TIP                                       :{BLACK}Place trees of random type
 
 STR_CANT_BUILD_CANALS                                           :{WHITE}Can't build canals here...
-STR_BUILD_CANALS_TIP                                            :{BLACK}Build canals
+STR_BUILD_CANALS_TIP                                            :{BLACK}Build canals. Press CTRL to place sea tiles (at sea-level only.)
 STR_LANDINFO_CANAL                                              :Canal
 
 STR_CANT_BUILD_LOCKS                                            :{WHITE}Can't build locks here...