diff --git a/src/killer_sokoban/SimpleField.java b/src/killer_sokoban/SimpleField.java
index e3f9445393cc5b0591eeeaa1df70f733bdbe378a..39163f218a6de0084ad681172cdc18fa73b25386 100644
--- a/src/killer_sokoban/SimpleField.java
+++ b/src/killer_sokoban/SimpleField.java
@@ -127,7 +127,7 @@ public class SimpleField extends AbstractField {
 		}
 		@Override
 		public String toString() {
-			return "Oil";
+			return "oil";
 		}
 	}
 	
@@ -137,7 +137,7 @@ public class SimpleField extends AbstractField {
 		}
 		@Override
 		public String toString() {
-			return "Honey";
+			return "honey";
 		}
 	}