diff --git a/src/script/script.h b/src/script/script.h
index 9c22cb908cf..e3af4a6fd9d 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -194,7 +194,10 @@ public:
         m_value = n;
     }
 
-    explicit CScriptNum(const std::vector<unsigned char>& vch, bool fRequireMinimal)
+    static const size_t nDefaultMaxNumSize = 4;
+
+    explicit CScriptNum(const std::vector<unsigned char>& vch, bool fRequireMinimal,
+                        const size_t nMaxNumSize = nDefaultMaxNumSize)
     {
         if (vch.size() > nMaxNumSize) {
             throw scriptnum_error("script number overflow");
@@ -317,8 +320,6 @@ public:
         return result;
     }
 
-    static const size_t nMaxNumSize = 4;
-
 private:
     static int64_t set_vch(const std::vector<unsigned char>& vch)
     {
diff --git a/src/test/scriptnum_tests.cpp b/src/test/scriptnum_tests.cpp
index 5621e127293..2f88b067666 100644
--- a/src/test/scriptnum_tests.cpp
+++ b/src/test/scriptnum_tests.cpp
@@ -142,7 +142,7 @@ static void RunCreate(const int64_t& num)
 {
     CheckCreateInt(num);
     CScriptNum scriptnum(num);
-    if (scriptnum.getvch().size() <= CScriptNum::nMaxNumSize)
+    if (scriptnum.getvch().size() <= CScriptNum::nDefaultMaxNumSize)
         CheckCreateVch(num);
     else
     {