diff --git a/common/plugins/altium/altium_parser.cpp b/common/plugins/altium/altium_parser.cpp
index b72d01e4a2..cd43ef42dd 100644
--- a/common/plugins/altium/altium_parser.cpp
+++ b/common/plugins/altium/altium_parser.cpp
@@ -83,12 +83,20 @@ std::map<wxString, wxString> ALTIUM_PARSER::ReadProperties()
     std::map<wxString, wxString> kv;
 
     uint32_t length = Read<uint32_t>();
-    if( length > GetRemainingBytes() || m_pos[length - 1] != '\0' )
+    if( length > GetRemainingBytes() )
     {
         m_error = true;
         return kv;
     }
 
+    // There is one case by kliment where Board6 ends with "|NEARDISTANCE=1000mi".
+    // Both the 'l' and the null-byte are missing, which looks like Altium swallowed two bytes.
+    if( m_pos[length - 1] != '\0' )
+    {
+        wxLogError( "For Altium import, we assumes a null byte at the end of a list of properties. "
+                    "Because this is missing, imported data might be malformed or missing." );
+    }
+
     //we use std::string because std::string can handle NULL-bytes
     //wxString would end the string at the first NULL-byte
     std::string str = std::string( m_pos, length - 1 );