diff --git a/include/react_table.h b/include/react_table.h
new file mode 100644
index 0000000000000000000000000000000000000000..b897485d5d1f51956329cbc4ac70fcb9a25fd595
--- /dev/null
+++ b/include/react_table.h
@@ -0,0 +1,23 @@
+/** @file  react_table.h
+ *  @brief Maximum size of lookup tables.
+ */
+#ifndef _REACT_TABLE_H_
+#define MAX_TABLE_SIZE 500
+
+typedef struct react_table react_table;
+
+struct react_table
+{
+  double e_min;
+  double e_step;
+
+  double underflow;
+  double overflow;
+
+  int steps;
+  
+  double values[MAX_TABLE_SIZE];
+};
+
+#define _REACT_TABLE_H_
+#endif