diff --git a/src/api/l_physics_shapes.c b/src/api/l_physics_shapes.c
index d923d7fd..66e4a7ae 100644
--- a/src/api/l_physics_shapes.c
+++ b/src/api/l_physics_shapes.c
@@ -114,8 +114,8 @@ Shape* luax_newterrainshape(lua_State* L, int index) {
     uint32_t n = luax_optu32(L, index + 1, 100);
     float* vertices = lovrMalloc(sizeof(float) * n * n);
     for (uint32_t i = 0; i < n * n; i++) {
-      float x = scaleXZ * (-.5f + ((float) (i % n)) / n);
-      float z = scaleXZ * (-.5f + ((float) (i / n)) / n);
+      float x = scaleXZ * (-.5f + ((float) (i % n)) / (n - 1));
+      float z = scaleXZ * (-.5f + ((float) (i / n)) / (n - 1));
       lua_pushvalue(L, index);
       lua_pushnumber(L, x);
       lua_pushnumber(L, z);
diff --git a/src/modules/physics/physics_jolt.c b/src/modules/physics/physics_jolt.c
index 5ae4121d..9fb560d6 100644
--- a/src/modules/physics/physics_jolt.c
+++ b/src/modules/physics/physics_jolt.c
@@ -964,9 +964,9 @@ TerrainShape* lovrTerrainShapeCreate(float* vertices, uint32_t n, float scaleXZ,
     .z = -.5f * scaleXZ
   };
   const JPH_Vec3 scale = {
-    .x = scaleXZ / n,
+    .x = scaleXZ / (n - 1),
     .y = scaleY,
-    .z = scaleXZ / n
+    .z = scaleXZ / (n - 1)
   };
 
   JPH_HeightFieldShapeSettings* shape_settings = JPH_HeightFieldShapeSettings_Create(vertices, &offset, &scale, n);