diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1210,7 +1210,7 @@
             }
 
             // Size limits
-            if (stack.size() + altstack.size() > 1000) {
+            if (stack.size() + altstack.size() > MAX_STACK_SIZE) {
                 return set_error(serror, SCRIPT_ERR_STACK_SIZE);
             }
         }
diff --git a/src/script/script.h b/src/script/script.h
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -31,6 +31,9 @@
 // Maximum script length in bytes
 static const int MAX_SCRIPT_SIZE = 10000;
 
+// Maximum number of values on script interpreter stack
+static const int MAX_STACK_SIZE = 1000;
+
 // Threshold for nLockTime: below this value it is interpreted as block number,
 // otherwise as UNIX timestamp. Thresold is Tue Nov 5 00:53:20 1985 UTC
 static const unsigned int LOCKTIME_THRESHOLD = 500000000;