diff --git a/src/univalue/gen/gen.cpp b/src/univalue/gen/gen.cpp
new file mode 100644
index 0000000..85fe209
--- /dev/null
+++ b/src/univalue/gen/gen.cpp
@@ -0,0 +1,82 @@
+// Copyright 2014 BitPay Inc.
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+//
+// To re-create univalue_escapes.h:
+// $ g++ -o gen gen.cpp
+// $ ./gen > univalue_escapes.h
+//
+
+#include <stdio.h>
+#include <string.h>
+#include "univalue.h"
+
+static bool initEscapes;
+static std::string escapes[256];
+
+static void initJsonEscape()
+{
+    // Escape all lower control characters (some get overridden with smaller sequences below)
+    for (int ch=0x00; ch<0x20; ++ch) {
+        char tmpbuf[20];
+        snprintf(tmpbuf, sizeof(tmpbuf), "\\u%04x", ch);
+        escapes[ch] = std::string(tmpbuf);
+    }
+
+    escapes[(int)'"'] = "\\\"";
+    escapes[(int)'\\'] = "\\\\";
+    escapes[(int)'\b'] = "\\b";
+    escapes[(int)'\f'] = "\\f";
+    escapes[(int)'\n'] = "\\n";
+    escapes[(int)'\r'] = "\\r";
+    escapes[(int)'\t'] = "\\t";
+    escapes[(int)'\x7f'] = "\\u007f"; // U+007F DELETE
+
+    initEscapes = true;
+}
+
+static void outputEscape()
+{
+	printf(	"// Automatically generated file. Do not modify.\n"
+		"#ifndef BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n"
+		"#define BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n"
+		"static const char *escapes[256] = {\n");
+
+	for (unsigned int i = 0; i < 256; i++) {
+		if (escapes[i].empty()) {
+			printf("\tNULL,\n");
+		} else {
+			printf("\t\"");
+
+			unsigned int si;
+			for (si = 0; si < escapes[i].size(); si++) {
+				char ch = escapes[i][si];
+				switch (ch) {
+				case '"':
+					printf("\\\"");
+					break;
+				case '\\':
+					printf("\\\\");
+					break;
+				default:
+					printf("%c", escapes[i][si]);
+					break;
+				}
+			}
+
+			printf("\",\n");
+		}
+	}
+
+	printf(	"};\n"
+		"#endif // BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H\n");
+}
+
+int main (int argc, char *argv[])
+{
+	initJsonEscape();
+	outputEscape();
+	return 0;
+}
+