diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleSolver.java b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleSolver.java
index 9749a7769e..5d063828b0 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleSolver.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleSolver.java
@@ -31,6 +31,7 @@ import net.runelite.client.plugins.puzzlesolver.solver.pathfinding.Pathfinder;
 public class PuzzleSolver implements Runnable
 {
 	public static final int DIMENSION = 5;
+	public static final int BLANK_TILE_VALUE = -1;
 
 	private Pathfinder pathfinder;
 	private PuzzleState startState;
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleState.java b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleState.java
index 36db17893f..440276a13f 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleState.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/PuzzleState.java
@@ -30,6 +30,7 @@ import java.util.Arrays;
 import java.util.List;
 import net.runelite.client.plugins.puzzlesolver.solver.heuristics.Heuristic;
 import static net.runelite.client.plugins.puzzlesolver.solver.PuzzleSolver.DIMENSION;
+import static net.runelite.client.plugins.puzzlesolver.solver.PuzzleSolver.BLANK_TILE_VALUE;
 
 public class PuzzleState
 {
@@ -54,7 +55,7 @@ public class PuzzleState
 
 		for (int i = 0; i < pieces.length; i++)
 		{
-			if (pieces[i] == -1)
+			if (pieces[i] == BLANK_TILE_VALUE)
 			{
 				emptyPiece = i;
 			}
@@ -89,7 +90,7 @@ public class PuzzleState
 				PuzzleState state = new PuzzleState(this);
 				state.parent = this;
 
-				state.pieces[emptyPiece - 1] = -1;
+				state.pieces[emptyPiece - 1] = BLANK_TILE_VALUE;
 				state.pieces[emptyPiece] = pieces[emptyPiece - 1];
 				state.emptyPiece--;
 
@@ -105,7 +106,7 @@ public class PuzzleState
 				PuzzleState state = new PuzzleState(this);
 				state.parent = this;
 
-				state.pieces[emptyPiece + 1] = -1;
+				state.pieces[emptyPiece + 1] = BLANK_TILE_VALUE;
 				state.pieces[emptyPiece] = pieces[emptyPiece + 1];
 				state.emptyPiece++;
 
@@ -121,7 +122,7 @@ public class PuzzleState
 				PuzzleState state = new PuzzleState(this);
 				state.parent = this;
 
-				state.pieces[emptyPiece - DIMENSION] = -1;
+				state.pieces[emptyPiece - DIMENSION] = BLANK_TILE_VALUE;
 				state.pieces[emptyPiece] = pieces[emptyPiece - DIMENSION];
 				state.emptyPiece -= DIMENSION;
 
@@ -137,7 +138,7 @@ public class PuzzleState
 				PuzzleState state = new PuzzleState(this);
 				state.parent = this;
 
-				state.pieces[emptyPiece + DIMENSION] = -1;
+				state.pieces[emptyPiece + DIMENSION] = BLANK_TILE_VALUE;
 				state.pieces[emptyPiece] = pieces[emptyPiece + DIMENSION];
 				state.emptyPiece += DIMENSION;
 
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/heuristics/ManhattanDistance.java b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/heuristics/ManhattanDistance.java
index 7bcb3891b8..9c89f9e71d 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/heuristics/ManhattanDistance.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/puzzlesolver/solver/heuristics/ManhattanDistance.java
@@ -28,6 +28,7 @@ package net.runelite.client.plugins.puzzlesolver.solver.heuristics;
 
 import net.runelite.client.plugins.puzzlesolver.solver.PuzzleState;
 import static net.runelite.client.plugins.puzzlesolver.solver.PuzzleSolver.DIMENSION;
+import static net.runelite.client.plugins.puzzlesolver.solver.PuzzleSolver.BLANK_TILE_VALUE;
 
 /**
  * An implementation of the manhattan distance heuristic function.
@@ -51,7 +52,7 @@ public class ManhattanDistance implements Heuristic
 				{
 					int piece = state.getPiece(x, y);
 
-					if (piece == -1)
+					if (piece == BLANK_TILE_VALUE)
 					{
 						continue;
 					}