diff --git a/base/src/main/kotlin/dev/nathanpb/dml/blockEntity/BlockEntityTrialKeystone.kt b/base/src/main/kotlin/dev/nathanpb/dml/blockEntity/BlockEntityTrialKeystone.kt
index bb43e47f..c99ef2d9 100644
--- a/base/src/main/kotlin/dev/nathanpb/dml/blockEntity/BlockEntityTrialKeystone.kt
+++ b/base/src/main/kotlin/dev/nathanpb/dml/blockEntity/BlockEntityTrialKeystone.kt
@@ -273,7 +273,7 @@ class BlockEntityTrialKeystone(pos: BlockPos, state: BlockState) :
                             val innerBlockPos = BlockPos(x, y, z)
                             if (
                                 innerBlockPos != pos
-                                && innerBlockPos.getSquaredDistance(pos) <= config.trial.arenaRadius.squared()
+                                && innerBlockPos.getSquaredDistance(pos) < config.trial.arenaRadius.squared()
                                 && world?.getBlockState(innerBlockPos)?.isAir != true
                             ) {
                                 list += innerBlockPos
diff --git a/base/src/main/kotlin/dev/nathanpb/dml/utils/Math.kt b/base/src/main/kotlin/dev/nathanpb/dml/utils/Math.kt
index a6ceb09d..24ff9e4e 100644
--- a/base/src/main/kotlin/dev/nathanpb/dml/utils/Math.kt
+++ b/base/src/main/kotlin/dev/nathanpb/dml/utils/Math.kt
@@ -24,6 +24,7 @@ import kotlin.random.Random
 fun Double.lerp(min: Double, max: Double) = (1 - this) * min + this * max
 fun Int.lerp(min: Double, max: Double) = (1 - this) * min + this * max
 
+fun Double.squared() = this * this
 fun Int.squared() = this * this
 
 // https://stackoverflow.com/a/35701777/9893963