diff --git a/src/main/java/vazkii/botania/api/subtile/SubTileFunctional.java b/src/main/java/vazkii/botania/api/subtile/SubTileFunctional.java
index 90863a717..4b7b59bf6 100644
--- a/src/main/java/vazkii/botania/api/subtile/SubTileFunctional.java
+++ b/src/main/java/vazkii/botania/api/subtile/SubTileFunctional.java
@@ -107,7 +107,7 @@ public class SubTileFunctional extends SubTileEntity {
 
 		if(!needsNew && linkedPool != null) {
 			TileEntity tileAt = supertile.getWorldObj().getTileEntity(linkedPool.xCoord, linkedPool.yCoord, linkedPool.zCoord);
-			if(!(tileAt instanceof IManaPool) || !tileAt.isInvalid()) {
+			if(!(tileAt instanceof IManaPool) || tileAt.isInvalid()) {
 				linkedPool = null;
 				needsNew = true;
 			} else linkedPool = tileAt;
diff --git a/src/main/java/vazkii/botania/api/subtile/SubTileGenerating.java b/src/main/java/vazkii/botania/api/subtile/SubTileGenerating.java
index d08d61565..5599bf85e 100644
--- a/src/main/java/vazkii/botania/api/subtile/SubTileGenerating.java
+++ b/src/main/java/vazkii/botania/api/subtile/SubTileGenerating.java
@@ -100,7 +100,7 @@ public class SubTileGenerating extends SubTileEntity {
 
 		if(!needsNew && linkedCollector != null) {
 			TileEntity tileAt = supertile.getWorldObj().getTileEntity(linkedCollector.xCoord, linkedCollector.yCoord, linkedCollector.zCoord);
-			if(!(tileAt instanceof IManaCollector) || !tileAt.isInvalid()) {
+			if(!(tileAt instanceof IManaCollector) || tileAt.isInvalid()) {
 				linkedCollector = null;
 				needsNew = true;
 			} else linkedCollector = tileAt;