diff --git a/tf_fuzz/utility/variables.hpp b/tf_fuzz/utility/variables.hpp
new file mode 100644
index 0000000..886acc3
--- /dev/null
+++ b/tf_fuzz/utility/variables.hpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <string>
+#include <vector>
+
+/* This file defines information to track regarding variables in the generated test
+   code. */
+
+#ifndef VARIABLES_HPP
+#define VARIABLES_HPP
+
+/* This project's header files #including other project headers quickly becomes
+   unrealistically complicated.  The only solution is for each .cpp to include
+   the headers it needs.  However these in particular are mostly axiomatic:  Not
+   dependent upon other classes. */
+
+
+using namespace std;
+
+
+/**********************************************************************************
+  Class variable_info tracks everything we know about a given variable in the
+  generated C code.
+**********************************************************************************/
+
+class variable_info
+{
+public:
+    // Data members:
+        /* The existence of this variable tracker means that the data variable and
+           the length variable have been declared, but there are other variants on
+           this variable that may or may not have been declared already.  Thus
+           the *_declared bool(s) below. */
+        bool hash_declared;  // true if the hash of this variable has been declared
+        bool value_known;  // true if the variable's value can be known in simulation
+        string name;  // variable name
+        unsigned char value[2048];  // the current value of the variable
+        int length;  // of the variable's value
+        psa_asset_type type;  // type of info contained in the variable
+
+    // Methods:
+        variable_info (void);  // (default constructor)
+        variable_info (  // (constructor with known name and type)
+            string var_name, psa_asset_type var_type
+        );
+        ~variable_info (void);  // (destructor)
+
+protected:
+    // Data members:
+};
+
+
+#endif // VARIABLES_HPP
+