diff --git a/src/main/java/ru/bclib/recipes/AnvilRecipe.java b/src/main/java/ru/bclib/recipes/AnvilRecipe.java
index 2baf291c..d761f68a 100644
--- a/src/main/java/ru/bclib/recipes/AnvilRecipe.java
+++ b/src/main/java/ru/bclib/recipes/AnvilRecipe.java
@@ -255,7 +255,7 @@ public class AnvilRecipe implements Recipe<Container>, UnknownReceipBookCategory
 		}
 
 		public void build() {
-			if (exist) {
+			if (!exist) {
 				return;
 			}
 			
diff --git a/src/main/java/ru/bclib/recipes/FurnaceRecipe.java b/src/main/java/ru/bclib/recipes/FurnaceRecipe.java
index 194aaf3e..c3e3c1be 100644
--- a/src/main/java/ru/bclib/recipes/FurnaceRecipe.java
+++ b/src/main/java/ru/bclib/recipes/FurnaceRecipe.java
@@ -75,7 +75,7 @@ public class FurnaceRecipe {
 	}
 	
 	public void build(boolean blasting, boolean campfire, boolean smoker) {
-		if (exist) {
+		if (!exist) {
 			return;
 		}