diff --git a/include/IOException.hpp b/include/IOException.hpp
index 1939922..ab3521c 100644
--- a/include/IOException.hpp
+++ b/include/IOException.hpp
@@ -40,7 +40,7 @@ public:
     /*! \brief The constructor for an IOException
      *  \param message The error message to throw
      */
-    IOException(const std::string& message) :
+    inline IOException(const std::string& message) :
         Exception("IOException: " + message)
     {}
 };
diff --git a/include/InvalidDataException.hpp b/include/InvalidDataException.hpp
new file mode 100644
index 0000000..b403d5f
--- /dev/null
+++ b/include/InvalidDataException.hpp
@@ -0,0 +1,29 @@
+#ifndef INVALIDDATAEXCEPTION_HPP
+#define INVALIDDATAEXCEPTION_HPP
+
+#include "Exception.hpp"
+
+namespace zelda
+{
+namespace error
+{
+/*! \class InvalidDataException
+ *  \brief An exception thrown on Invalid Data calls.
+ *
+ *  This should only be thrown when the library tries to
+ *  e.g pass a NULL pointer to a function which requires a valid pointer.
+ *  <br />
+ *  It is <b>NOT</b> appropriate to use <b>throw new</b> so avoid doing so,
+ *  keeping things on the stack as much as possible is very important for speed.
+ */
+class InvalidDataException : public Exception
+{
+public:
+    inline InvalidDataException(const std::string& error)
+        : Exception("InvalidDataException: " + error)
+    {
+    }
+};
+}
+}
+#endif // INVALIDDATAEXCEPTION_HPP
diff --git a/libzelda.pri b/libzelda.pri
index 0e1a87f..7d02833 100644
--- a/libzelda.pri
+++ b/libzelda.pri
@@ -55,7 +55,8 @@ HEADERS += \
     $$PWD/include/SpriteFileReader.hpp \
     $$PWD/include/SpriteFileWriter.hpp \
     $$PWD/include/SpriteFrame.hpp \
-    $$PWD/include/SpritePart.hpp
+    $$PWD/include/SpritePart.hpp \
+    ../libzelda/include/InvalidDataException.hpp
 
 SOURCES += \
     $$PWD/src/utility.cpp \