diff --git a/src/smt/seq/seq_nielsen.cpp b/src/smt/seq/seq_nielsen.cpp
index be28183f8..a5d021b2c 100644
--- a/src/smt/seq/seq_nielsen.cpp
+++ b/src/smt/seq/seq_nielsen.cpp
@@ -444,8 +444,8 @@ namespace seq {
     nielsen_graph::nielsen_graph(euf::sgraph& sg, simple_solver& solver):
         m_sg(sg),
         m_solver(solver),
+        m_len_vars(sg.get_manager()),
         m_parikh(alloc(seq_parikh, sg)) {
-        m_len_vars(sg.get_manager()) {
     }
 
     nielsen_graph::~nielsen_graph() {