diff --git a/source/Base/ScriptSrc.cpp b/source/Base/ScriptSrc.cpp
index 20e03f6f..209b1b49 100644
--- a/source/Base/ScriptSrc.cpp
+++ b/source/Base/ScriptSrc.cpp
@@ -150,8 +150,13 @@ ScriptSrc::ScriptSrc(HSQUIRRELVM vm, const String & path, bool info)
     {
         throw std::runtime_error("Invalid or empty script path");
     }
+    // Is the specified virtual machine invalid?
+    else if (!vm)
+    {
+        throw std::runtime_error("Invalid virtual machine pointer");
+    }
     // Should we load the file contents for debugging purposes?
-    if (info)
+    else if (info)
     {
         Process();
     }
diff --git a/source/Base/ScriptSrc.hpp b/source/Base/ScriptSrc.hpp
index e935da9e..2820a6d4 100644
--- a/source/Base/ScriptSrc.hpp
+++ b/source/Base/ScriptSrc.hpp
@@ -19,9 +19,6 @@ class Core;
 */
 class ScriptSrc
 {
-    // --------------------------------------------------------------------------------------------
-    friend class Core;
-
 public:
 
     // --------------------------------------------------------------------------------------------
@@ -33,8 +30,6 @@ public:
     String      mData; // The contents of the script file.
     Line        mLine; // List of lines of code in the data.
 
-private:
-
     /* --------------------------------------------------------------------------------------------
      * Read file contents and calculate information about the lines of code.
     */
@@ -45,8 +40,6 @@ private:
     */
     ScriptSrc(HSQUIRRELVM vm, const String & path, bool info = false);
 
-public:
-
     /* --------------------------------------------------------------------------------------------
      * Copy constructor.
     */