Index: /applications/editors/josm/plugins/terracer/src/terracer/HouseNumberInputHandler.java
===================================================================
--- /applications/editors/josm/plugins/terracer/src/terracer/HouseNumberInputHandler.java	(revision 19233)
+++ /applications/editors/josm/plugins/terracer/src/terracer/HouseNumberInputHandler.java	(revision 19234)
@@ -189,10 +189,10 @@
 				if (i < 0) {
 					appendMessageNewLine(message);
-					message.append(label + tr(" must be greater than 0"));
+					message.append(tr("{0} must be greater than 0", label));
 					return false;
 				}
 			} catch (NumberFormatException e) {
 				appendMessageNewLine(message);
-				message.append(label + tr(" is not a number"));
+				message.append(tr("{0} is not a number", label));
 				return false;
 			}