diff --git a/src/core_read.cpp b/src/core_read.cpp
--- a/src/core_read.cpp
+++ b/src/core_read.cpp
@@ -19,6 +19,7 @@
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
+#include <boost/lexical_cast.hpp>
 
 CScript ParseScript(const std::string &s) {
     CScript result;
@@ -121,7 +122,10 @@
 
         // If push_size is set, ensure have added the right amount of stuff.
         if (push_size != 0 && size_change != push_size) {
-            throw std::runtime_error("Wrong number of bytes being pushed.");
+            throw std::runtime_error(
+                "Wrong number of bytes being pushed. Expected:" +
+                boost::lexical_cast<std::string>(push_size) +
+                " Pushed:" + boost::lexical_cast<std::string>(size_change));
         }
 
         // If push_size is set, and we have push_data_size set, then we have a