diff --git a/src/root.jl b/src/root.jl
index 29540d1b..df92b441 100644
--- a/src/root.jl
+++ b/src/root.jl
@@ -327,6 +327,7 @@ function _normalize_ftype(fType)
     end
 end
 
+# TODO: there are still a few missing here (see constants.jl)
 const _leaftypeconstlookup = Dict(
                              Const.kBool   => Bool  ,
                              Const.kChar   => Int8  ,
@@ -344,6 +345,7 @@ const _leaftypeconstlookup = Dict(
                              Const.kDouble32 => Float32,
                              Const.kDouble =>   Float64,
                              Const.kFloat => Float32,
+                             Const.kTString => String,
                             )
 
 """
diff --git a/src/utils.jl b/src/utils.jl
index ef47e860..a6430fbd 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -71,6 +71,10 @@ function JaggType(f, branch, leaf)
             leaf isa TLeafElement && leaf.fLenType==0 && return Offsetjagg
             return Nojagg
         end
+        if typeof(streamer) <: TStreamerString
+            # TODO: there are for sure also jagged strings, need to find files with those
+            return Nojagg
+        end
         if streamer.fSTLtype == Const.kSTLvector
             (match(r"\[.*\]", leaf.fTitle) !== nothing) && return Offset6jaggjagg
             return Offsetjagg