diff --git a/src/company_gui.cpp b/src/company_gui.cpp
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -606,10 +606,10 @@ private:
 		if (default_livery != NULL) {
 			/* Add COLOUR_END to put the colour out of range, but also allow us to show what the default is */
 			default_col = (primary ? default_livery->colour1 : default_livery->colour2) + COLOUR_END;
-			*list->Append() = new DropDownListColourItem(default_col, false);
+			list->push_back(new DropDownListColourItem(default_col, false));
 		}
 		for (uint i = 0; i < lengthof(_colour_dropdown); i++) {
-			*list->Append() = new DropDownListColourItem(i, HasBit(used_colours, i));
+			list->push_back(new DropDownListColourItem(i, HasBit(used_colours, i)));
 		}
 
 		byte sel = (default_livery == NULL || HasBit(livery->in_use, primary ? 0 : 1)) ? (primary ? livery->colour1 : livery->colour2) : default_col;
@@ -642,8 +642,8 @@ private:
 	{
 		for (const Group **g = source->Begin(); g != source->End(); g++) {
 			if ((*g)->parent != parent) continue;
-			*this->groups.Append() = *g;
-			*this->indents.Append() = indent;
+			this->groups.push_back(*g);
+			this->indents.push_back(indent);
 			AddChildren(source, (*g)->index, indent + 1);
 		}
 	}
@@ -662,7 +662,7 @@ private:
 			const Group *g;
 			FOR_ALL_GROUPS(g) {
 				if (g->owner == owner && g->vehicle_type == vtype) {
-					*list.Append() = g;
+					list.push_back(g);
 				}
 			}