diff --git a/src/sysc/scc/tracer.cpp b/src/sysc/scc/tracer.cpp
index a1debdd7..82fd1ec6 100644
--- a/src/sysc/scc/tracer.cpp
+++ b/src/sysc/scc/tracer.cpp
@@ -55,7 +55,7 @@ tracer::tracer(std::string const&& name, file_type tx_type, file_type sig_type,
     if(sig_type == ENABLE)
         sig_type = static_cast<file_type>(sig_trace_type.get_value());
     if(sig_type != NONE) {
-        switch(sig_type) {
+        switch(tx_type) {
         default:
             trf = sc_create_vcd_trace_file(name.c_str());
             break;