diff --git a/src/ObjCommon/InfoString/InfoString.cpp b/src/ObjCommon/InfoString/InfoString.cpp
index 2f39d60a..14efada8 100644
--- a/src/ObjCommon/InfoString/InfoString.cpp
+++ b/src/ObjCommon/InfoString/InfoString.cpp
@@ -185,6 +185,16 @@ bool InfoString::FromStream(const std::string& prefix, std::istream& stream)
     std::string key;
     while (infoStream.NextField(key))
     {
+        if (key.empty())
+        {
+            if (m_keys_by_insertion.empty())
+                std::cerr << "Invalid info string: Got empty key at the start of the info string\n";
+            else
+                std::cerr << "Invalid info string: Got empty key after key \"" << m_keys_by_insertion[m_keys_by_insertion.size() - 1] << "\"\n";
+
+            return false;
+        }
+
         std::string value;
         if (!infoStream.NextField(value))
         {