diff --git a/src/script/script.cpp b/src/script/script.cpp
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -262,6 +262,35 @@
     }
 }
 
+std::vector<uint8_t>
+MinimalizeBigEndianArray(const std::vector<uint8_t> &data) {
+    std::vector<uint8_t> res;
+
+    // Ensure we have a byte to work with.
+    if (bin.size() == 0) {
+        bin.push_back(0);
+    }
+
+    // Check for a negative bit
+    uint8_t neg = 0;
+    if ((bin[0] & 0x80) != 0) {
+        // Trim down
+        bin[0] ^= 0x80;
+        neg = 0x80;
+    }
+    bool start = false;
+    for (size_t i = 0; i < bin.size(); ++i) {
+        if (!start && bin[i] == 0) {
+            start = true;
+            continue;
+        }
+        res.push_back(bin[i]);
+    }
+    res[0] ^= neg;
+
+    return std::move(res);
+}
+
 unsigned int CScript::GetSigOpCount(bool fAccurate) const {
     unsigned int n = 0;
     const_iterator pc = begin();
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -414,6 +414,16 @@
 }
 } // namespace
 
+BOOST_AUTO_TEST_CASE(MinimalizeBigEndianArray) {
+    std::vector<uint8_t> input = {
+        {0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}};
+    std::vector<uint8_t> check = {{0x81}};
+
+    out = MinimalizeBigEndianArray(input);
+
+    BOOST_CHECK_EQUAL(out, check);
+}
+
 BOOST_AUTO_TEST_CASE(script_build) {
     const KeyData keys;