diff --git a/com.htc.upm.vive.openxr/Runtime/CompositionLayer/Scripts/CompositionLayerPassthroughAPI.cs b/com.htc.upm.vive.openxr/Runtime/CompositionLayer/Scripts/CompositionLayerPassthroughAPI.cs
index 91ba06a..54fdfaa 100644
--- a/com.htc.upm.vive.openxr/Runtime/CompositionLayer/Scripts/CompositionLayerPassthroughAPI.cs
+++ b/com.htc.upm.vive.openxr/Runtime/CompositionLayer/Scripts/CompositionLayerPassthroughAPI.cs
@@ -416,6 +416,7 @@ public static bool DestroyPassthrough(int passthroughID)
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_DestroyPassthrough(passthroughID);
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -474,7 +475,8 @@ public static bool SetPassthroughAlpha(int passthroughID, float alpha, bool auto
 			else
 				return false;
 #endif
-		}
+            return false;
+        }
 
 		/// <summary>
 		/// For modifying the mesh data of a projected passthrough layer.
@@ -545,6 +547,7 @@ public static bool SetProjectedPassthroughMesh(int passthroughID, [In, Out] Vect
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMesh(passthroughID, (uint)vertexBuffer.Length, vertexBufferXrVector, (uint)indexBuffer.Length, indexBufferUint); ;
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -623,7 +626,8 @@ public static bool SetProjectedPassthroughMeshTransform(int passthroughID, Proje
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMeshTransform(passthroughID, passthroughFeature.GetXrSpaceFromSpaceType(spaceType), meshXrPose, meshXrScale);
 #endif
-		}
+            return false;
+        }
 
 		/// <summary>
 		/// For modifying layer type and composition depth of a passthrough layer.
@@ -661,7 +665,7 @@ public static bool SetPassthroughLayerType(int passthroughID, LayerType layerTyp
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetLayerType(passthroughID, layerType, compositionDepth);
 #endif
-
+            return false;
 		}
 
 		/// <summary>
@@ -702,6 +706,7 @@ public static bool SetProjectedPassthroughSpaceType(int passthroughID, Projected
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMeshTransformSpace(passthroughID, passthroughFeature.GetXrSpaceFromSpaceType(spaceType));
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -764,6 +769,7 @@ public static bool SetProjectedPassthroughMeshPosition(int passthroughID, Vector
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMeshTransformPosition(passthroughID, OpenXRHelper.ToOpenXRVector(trackingSpaceMeshPosition, convertFromUnityToOpenXR));
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -826,6 +832,7 @@ public static bool SetProjectedPassthroughMeshOrientation(int passthroughID, Qua
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMeshTransformOrientation(passthroughID, OpenXRHelper.ToOpenXRQuaternion(trackingSpaceMeshRotation, convertFromUnityToOpenXR));
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -867,6 +874,7 @@ public static bool SetProjectedPassthroughScale(int passthroughID, Vector3 meshS
 #if UNITY_ANDROID
 			return passthroughFeature.HTCPassthrough_SetMeshTransformScale(passthroughID, OpenXRHelper.ToOpenXRVector(meshScale, false));
 #endif
+            return false;
 		}
 
 		/// <summary>
@@ -887,4 +895,4 @@ public static List<int> GetCurrentPassthroughLayerIDs()
 		}
 #endregion
 	}
-}
\ No newline at end of file
+}