diff --git a/src/terraform_cmd.h b/src/terraform_cmd.h
--- a/src/terraform_cmd.h
+++ b/src/terraform_cmd.h
@@ -21,7 +21,6 @@ DEF_CMD_TRAIT(CMD_TERRAFORM_LAND, CmdTer
 DEF_CMD_TRAIT(CMD_LEVEL_LAND,     CmdLevelLand,     CMD_ALL_TILES | CMD_AUTO | CMD_NO_TEST, CMDT_LANDSCAPE_CONSTRUCTION) // test run might clear tiles multiple times, in execution that only happens once
 
 CommandCallback CcPlaySound_EXPLOSION;
-CommandCallback CcPlaceSign;
 CommandCallback CcTerraform;
 
 #endif /* TERRAFORM_CMD_H */