diff --git a/src/etTran.cpp b/src/etTran.cpp
index 128cea82..0d643cb2 100644
--- a/src/etTran.cpp
+++ b/src/etTran.cpp
@@ -2131,7 +2131,7 @@ List etTransParse(List inData, List mv, bool addCmt=false,
     } else if (TYPEOF(cur) == LGLSXP) {
       curType[0]  = IntegerVector::create(5);
       curType[1]  = R_NilValue;
-      inDataFK[j] = cur;
+      inDataFK[j] = as<NumericVector>(cur);
       inDataFKL[j] = curType;
     } else {
       stop(_("the columns that are kept must be either a logical, string, a factor, an integer number, or a real number"));