diff --git a/tools/oneclick/base/modelsim_config.py b/tools/oneclick/base/modelsim_config.py
index bdfe4d40632cd820ba7cb7cb940d86d81c93ac2a..30ee59d1997df4ba00ce33b8b354fc649895fa8b 100755
--- a/tools/oneclick/base/modelsim_config.py
+++ b/tools/oneclick/base/modelsim_config.py
@@ -252,7 +252,7 @@ class ModelsimConfig(hdl_config.HdlConfig):
                 fp.write('Project_Sim_Count = %d\n' % len(test_bench_files))
                 project_sim_p_defaults = 'Generics {} timing default -std_output {} -nopsl 0 +notimingchecks 0 selected_du {} -hazards 0 -sdf {} ok 1 -0in 0 -nosva 0 +pulse_r {} -absentisempty 0 -multisource_delay {} +pulse_e {} vopt_env 1 -coverage 0 -sdfnoerror 0 +plusarg {} -vital2.2b 0 -t default -memprof 0 is_vopt_flow 0 -noglitch 0 -nofileshare 0 -wlf {} -assertdebug 0 +no_pulse_msg 0 -0in_options {} -assertfile {} -sdfnowarn 0 -Lf {} -std_input {}'
                 project_sim_p_search_libraries = '-L {}'
-                if 'modelsim_search_libraries' in lib_dict:
+                if 'modelsim_search_libraries' in self.tool_dict:
                     project_sim_p_search_libraries = '-L {'
                     for sl in self.tool_dict['modelsim_search_libraries'].split():
                         project_sim_p_search_libraries += sl