diff --git a/Editor/JSONChecker.cs b/Editor/JSONChecker.cs
index 7a48151..9463010 100644
--- a/Editor/JSONChecker.cs
+++ b/Editor/JSONChecker.cs
@@ -23,6 +23,12 @@ THE SOFTWARE.
 //#define JSONOBJECT_PERFORMANCE_TEST //For testing performance of parse/stringify.  Turn on editor profiling to see how we're doing
 // ReSharper disable UseStringInterpolation
 
+#if UNITY_2 || UNITY_3 || UNITY_4 || UNITY_5 || UNITY_5_3_OR_NEWER
+#define USING_UNITY
+#endif
+
+#if USING_UNITY
+
 using Defective.JSON.Tests;
 using UnityEngine;
 using UnityEditor;
@@ -118,3 +124,5 @@ void OnGUI() {
 		}
 	}
 }
+
+#endif
diff --git a/JSONObject.cs b/JSONObject.cs
index 2a486fd..a00bbbc 100644
--- a/JSONObject.cs
+++ b/JSONObject.cs
@@ -843,7 +843,12 @@ static bool ParseObjectEnd(string inputString, int offset, bool openQuote, JSONO
 				return true;
 
 			if (container == null) {
-				Debug.LogError("Parsing error: encountered `}` with no container object");
+#if USING_UNITY
+				Debug.LogError
+#else
+				Debug.WriteLine
+#endif
+				("Parsing error: encountered `}` with no container object");
 				return false;
 			}
 
@@ -870,7 +875,12 @@ static bool ParseArrayEnd(string inputString, int offset, bool openQuote, JSONOb
 				return true;
 
 			if (container == null) {
-				Debug.LogError("Parsing error: encountered `]` with no container object");
+#if USING_UNITY
+				Debug.LogError
+#else
+				Debug.WriteLine
+#endif
+				("Parsing error: encountered `]` with no container object");
 				return false;
 			}
 
@@ -907,7 +917,12 @@ static bool ParseColon(string inputString, bool openQuote, JSONObject container,
 				return true;
 
 			if (container == null) {
-				Debug.LogError("Parsing error: encountered `:` with no container object");
+#if USING_UNITY
+				Debug.LogError
+#else
+				Debug.WriteLine
+#endif
+				("Parsing error: encountered `:` with no container object");
 				return false;
 			}
 
@@ -929,7 +944,12 @@ static bool ParseComma(string inputString, bool openQuote, JSONObject container,
 				return true;
 
 			if (container == null) {
-				Debug.LogError("Parsing error: encountered `,` with no container object");
+#if USING_UNITY
+				Debug.LogError
+#else
+				Debug.WriteLine
+#endif
+				("Parsing error: encountered `,` with no container object");
 				return false;
 			}
 
diff --git a/VectorTemplates.cs b/VectorTemplates.cs
index e3c1bd6..86570ac 100644
--- a/VectorTemplates.cs
+++ b/VectorTemplates.cs
@@ -20,6 +20,12 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 
+#if UNITY_2 || UNITY_3 || UNITY_4 || UNITY_5 || UNITY_5_3_OR_NEWER
+#define USING_UNITY
+#endif
+
+#if USING_UNITY
+
 using UnityEngine;
 
 namespace Defective.JSON {
@@ -299,3 +305,5 @@ public static JSONObject ToJson(this RectOffset rectOffset) {
 		}
 	}
 }
+
+#endif