diff --git a/modules/mol/alg/src/construct_cbeta.cc b/modules/mol/alg/src/construct_cbeta.cc
index f4c04f1d580b96f6fe9b98404555603d6a3524a5..19cdec41dafd5ea4e3a1369d6bd21520e464c1cf 100644
--- a/modules/mol/alg/src/construct_cbeta.cc
+++ b/modules/mol/alg/src/construct_cbeta.cc
@@ -30,7 +30,7 @@ bool CBetaInserter::VisitResidue(const mol::ResidueHandle& res)
     return false;
   }
   try { 
-    if(res.GetOneLetterCode()=='G' and include_gly_==false) {
+    if(res.GetOneLetterCode()=='G' && include_gly_==false) {
       return false;
     }
     if (res.FindAtom("CB").IsValid()) {