diff --git a/src/DotRecast.Detour/DtNavMeshQuery.cs b/src/DotRecast.Detour/DtNavMeshQuery.cs
index 2decd95..9eca19b 100644
--- a/src/DotRecast.Detour/DtNavMeshQuery.cs
+++ b/src/DotRecast.Detour/DtNavMeshQuery.cs
@@ -287,7 +287,7 @@ namespace DotRecast.Detour
                         Array.Copy(bestTile.data.verts, bestPoly.verts[j] * 3, polyVerts, j * 3, 3);
                     }
 
-                    float[] constrainedVerts = constraint.Aply(polyVerts, centerPos, maxRadius);
+                    float[] constrainedVerts = constraint.Apply(polyVerts, centerPos, maxRadius);
                     if (constrainedVerts != null)
                     {
                         int vertCount = constrainedVerts.Length / 3;
diff --git a/src/DotRecast.Detour/IPolygonByCircleConstraint.cs b/src/DotRecast.Detour/IPolygonByCircleConstraint.cs
index 03a2960..4855429 100644
--- a/src/DotRecast.Detour/IPolygonByCircleConstraint.cs
+++ b/src/DotRecast.Detour/IPolygonByCircleConstraint.cs
@@ -23,6 +23,6 @@ namespace DotRecast.Detour
 {
     public interface IPolygonByCircleConstraint
     {
-        float[] Aply(float[] polyVerts, RcVec3f circleCenter, float radius);
+        float[] Apply(float[] polyVerts, RcVec3f circleCenter, float radius);
     }
 }
\ No newline at end of file
diff --git a/src/DotRecast.Detour/NoOpPolygonByCircleConstraint.cs b/src/DotRecast.Detour/NoOpPolygonByCircleConstraint.cs
index 5599b84..2238024 100644
--- a/src/DotRecast.Detour/NoOpPolygonByCircleConstraint.cs
+++ b/src/DotRecast.Detour/NoOpPolygonByCircleConstraint.cs
@@ -10,7 +10,7 @@ namespace DotRecast.Detour
         {
         }
 
-        public float[] Aply(float[] polyVerts, RcVec3f circleCenter, float radius)
+        public float[] Apply(float[] polyVerts, RcVec3f circleCenter, float radius)
         {
             return polyVerts;
         }
diff --git a/src/DotRecast.Detour/StrictPolygonByCircleConstraint.cs b/src/DotRecast.Detour/StrictPolygonByCircleConstraint.cs
index cb09e99..0ced034 100644
--- a/src/DotRecast.Detour/StrictPolygonByCircleConstraint.cs
+++ b/src/DotRecast.Detour/StrictPolygonByCircleConstraint.cs
@@ -31,7 +31,7 @@ namespace DotRecast.Detour
             return temp;
         }
 
-        public float[] Aply(float[] verts, RcVec3f center, float radius)
+        public float[] Apply(float[] verts, RcVec3f center, float radius)
         {
             float radiusSqr = radius * radius;
             int outsideVertex = -1;
diff --git a/test/DotRecast.Detour.Test/PolygonByCircleConstraintTest.cs b/test/DotRecast.Detour.Test/PolygonByCircleConstraintTest.cs
index f6b3b68..df356ac 100644
--- a/test/DotRecast.Detour.Test/PolygonByCircleConstraintTest.cs
+++ b/test/DotRecast.Detour.Test/PolygonByCircleConstraintTest.cs
@@ -31,7 +31,7 @@ public class PolygonByCircleConstraintTest
     {
         float[] polygon = { -2, 0, 2, 2, 0, 2, 2, 0, -2, -2, 0, -2 };
         RcVec3f center = RcVec3f.Of(1, 0, 1);
-        float[] constrained = _constraint.Aply(polygon, center, 6);
+        float[] constrained = _constraint.Apply(polygon, center, 6);
 
         Assert.That(constrained, Is.EqualTo(polygon));
     }
@@ -43,7 +43,7 @@ public class PolygonByCircleConstraintTest
         float[] polygon = { -2, 0, 2, 2, 0, 2, 2, 0, -2, -2, 0, -2 };
         RcVec3f center = RcVec3f.Of(2, 0, 0);
 
-        float[] constrained = _constraint.Aply(polygon, center, 3);
+        float[] constrained = _constraint.Apply(polygon, center, 3);
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
         Assert.That(constrained, Is.SupersetOf(new[] { 2f, 0f, 2f, 2f, 0f, -2f }));
     }
@@ -54,7 +54,7 @@ public class PolygonByCircleConstraintTest
         int expectedSize = 12 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
         RcVec3f center = RcVec3f.Of(-1, 0, -1);
-        float[] constrained = _constraint.Aply(polygon, center, 2);
+        float[] constrained = _constraint.Apply(polygon, center, 2);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
 
@@ -72,7 +72,7 @@ public class PolygonByCircleConstraintTest
         int expectedSize = 9 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
         RcVec3f center = RcVec3f.Of(-2, 0, -1);
-        float[] constrained = _constraint.Aply(polygon, center, 3);
+        float[] constrained = _constraint.Apply(polygon, center, 3);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
         Assert.That(constrained, Is.SupersetOf(new[] { -2f, 0f, -4f, -4f, 0f, 0f, -3.4641016f, 0.0f, 1.6076951f, -2.0f, 0.0f, 2.0f }));
@@ -84,7 +84,7 @@ public class PolygonByCircleConstraintTest
         int expectedSize = 7 * 3;
         float[] polygon = { -4, 0, 0, -3, 0, 3, 2, 0, 3, 3, 0, -3, -2, 0, -4 };
         RcVec3f center = RcVec3f.Of(4, 0, 0);
-        float[] constrained = _constraint.Aply(polygon, center, 4);
+        float[] constrained = _constraint.Apply(polygon, center, 4);
 
         Assert.That(constrained.Length, Is.EqualTo(expectedSize));
         Assert.That(constrained, Is.SupersetOf(new[] { 1.5358982f, 0f, 3f, 2f, 0f, 3f, 3f, 0f, -3f }));