1 files changed, 1 insertions, 1 deletions
diff --git a/src/script.h b/src/script.h
index d490cd1824..e2b83bd6ee 100644
--- a/src/script.h
+++ b/src/script.h
@@ -452,7 +452,7 @@ public:
                 memcpy(&nSize, &pc[0], 4);
                 pc += 4;
             }
-            if (end() - pc < nSize)
+            if (end() - pc < 0 || (unsigned int)(end() - pc) < nSize)
                 return false;
             if (pvchRet)
                 pvchRet->assign(pc, pc + nSize);