diff --git a/src/pubkey.h b/src/pubkey.h
index 261842b7f7f..4c28af4a4df 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -142,6 +142,9 @@ public:
         unsigned int len = ::ReadCompactSize(s);
         if (len <= SIZE) {
             s.read((char*)vch, len);
+            if (len != size()) {
+                Invalidate();
+            }
         } else {
             // invalid pubkey, skip available data
             char dummy;