diff --git a/tools/msi2lmp/README b/tools/msi2lmp/README
index db9b1aca5efeec6f0d68dcf6539351426046f0d9..9ac7af560743a7f71853dd619ad012c778de0ef5 100644
--- a/tools/msi2lmp/README
+++ b/tools/msi2lmp/README
@@ -140,6 +140,8 @@ msi2lmp has the following known limitations:
 - there is no support for auto-equivalences to supplement fully
   parameterized interactions with heuristic ones
 - there is no support for bond increments
+- there is no support for coordinates defined by symmetry operations,
+  i.e. the .mdf file has to be set up for space group P1
 
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