diff --git a/src/colvar/MultiRMSD.cpp b/src/colvar/MultiRMSD.cpp
index a1f836f831e928cb44166ba2a01034238c42bbb2..1a45aecd9698ff0542f62599ff03fbc8abc841a4 100644
--- a/src/colvar/MultiRMSD.cpp
+++ b/src/colvar/MultiRMSD.cpp
@@ -148,6 +148,28 @@ END
 
 PLUMED_REGISTER_ACTION(MultiRMSD,"MULTI-RMSD")
 
+//+PLUMEDOC DCOLVAR MULTI_RMSD
+/*
+An alias to the \ref MULTI-RMSD function.
+
+\par Examples
+
+Just replace \ref MULTI-RMSD with \ref MULTI_RMSD
+
+\plumedfile
+MULTI_RMSD REFERENCE=file.pdb TYPE=MULTI-DRMSD
+\endplumedfile
+
+*/
+//+ENDPLUMEDOC
+
+class Multi_RMSD :
+  public MultiRMSD {
+};
+
+PLUMED_REGISTER_ACTION(MultiRMSD,"MULTI_RMSD")
+
+
 void MultiRMSD::registerKeywords(Keywords& keys) {
   Colvar::registerKeywords(keys);
   keys.add("compulsory","REFERENCE","a file in pdb format containing the reference structure and the atoms involved in the CV.");