diff --git a/src/main/java/net/brokenmoon/afloydwiremod/gui/GuiWiring.java b/src/main/java/net/brokenmoon/afloydwiremod/gui/GuiWiring.java
index 295bbb7..b10f44c 100644
--- a/src/main/java/net/brokenmoon/afloydwiremod/gui/GuiWiring.java
+++ b/src/main/java/net/brokenmoon/afloydwiremod/gui/GuiWiring.java
@@ -73,7 +73,7 @@ public class GuiWiring extends GuiScrollable {
                 tool.sideadd = new ArrayList<Integer>();
             }
         } else if(!this.tool.type.equals("unpaired")) {
-            if(this.tool.type.equals("input") && this.wireEntity.inputs[tool.slot].wire.isMade != true) {
+            if(this.tool.type.equals("input") && wireEntity.outputs[tool.slot].wire.isMade != true && otherEntity.inputs[guibutton.slot].wire.isMade != true) {
                 wireEntity.outputs[guibutton.slot].wire = new WireConnection(this.tool.x, this.tool.y, this.tool.z, guibutton.slot, tool.slot, tool.xadd, tool.yadd, tool.zadd, tool.sideadd, false, tool.red, tool.green, tool.blue, tool.alpha, tool.width);
                 otherEntity.inputs[tool.slot].wire = new WireConnection(this.wireEntity.xCoord, this.wireEntity.yCoord, this.wireEntity.zCoord, tool.slot, guibutton.slot);
                 wireEntity.updateIO();
@@ -82,7 +82,7 @@ public class GuiWiring extends GuiScrollable {
                 tool.zadd = new ArrayList<Integer>();
                 tool.sideadd = new ArrayList<Integer>();
                 tool.type = "unpaired";
-            } else if(this.tool.type.equals("output") && otherEntity.outputs[tool.slot].wire.isMade != true) {
+            } else if(this.tool.type.equals("output") && otherEntity.outputs[tool.slot].wire.isMade != true && wireEntity.inputs[tool.slot].wire.isMade != true ) {
                 if(otherEntity != null) {
                     otherEntity.outputs[tool.slot].wire = new WireConnection(this.wireEntity.xCoord, this.wireEntity.yCoord, this.wireEntity.zCoord, tool.slot, guibutton.slot, tool.xadd, tool.yadd, tool.zadd, tool.sideadd, true, tool.red, tool.green, tool.blue, tool.alpha, tool.width);
                     wireEntity.inputs[guibutton.slot].wire = new WireConnection(this.tool.x, this.tool.y, this.tool.z, guibutton.slot, tool.slot);
diff --git a/src/main/java/net/brokenmoon/afloydwiremod/ter/TERWire.java b/src/main/java/net/brokenmoon/afloydwiremod/ter/TERWire.java
index d08c033..c96f839 100644
--- a/src/main/java/net/brokenmoon/afloydwiremod/ter/TERWire.java
+++ b/src/main/java/net/brokenmoon/afloydwiremod/ter/TERWire.java
@@ -18,7 +18,7 @@ public class TERWire extends TileEntitySpecialRenderer {
     public void renderWireAt(AbstractWireTileEntity wireEntity, double x, double y, double z, float weird) {
         if(wireEntity.outputs != null){
             for(int it = 0; it < wireEntity.outputs.length; it++){
-                if(wireEntity.outputs[it].wire != null && wireEntity.outputs[it].wire.isMade){
+                if(wireEntity.outputs[it] != null && wireEntity.outputs[it].wire != null && wireEntity.outputs[it].wire.isMade){
                     this.renderLineBetweenTwoPoints(
                             wireEntity.xCoord, wireEntity.yCoord, wireEntity.zCoord,
                             wireEntity.outputs[it].wire.x, wireEntity.outputs[it].wire.y, wireEntity.outputs[it].wire.z,