diff --git a/neurodamus/core/stimuli.py b/neurodamus/core/stimuli.py
index 0dbf2e66..46e81678 100644
--- a/neurodamus/core/stimuli.py
+++ b/neurodamus/core/stimuli.py
@@ -434,17 +434,9 @@ class _DynamicClamp:
         def __init__(self, cell_section, position=0.5, clamp_container=None,
                      stim_vec_mode=True, time_vec=None, stim_vec=None,
                      reversal=0.0, **clamp_params):
-
-            # Checks if new conductanceSource mechanism is available
-            mt = Neuron.h.MechanismType(1)
-            mname = Neuron.h.ref('')
-            mList = []
-            for i in range(mt.count()):
-                mt.select(i)
-                mt.selected(mname)
-                mList.append(mname[0])
-
-            if 'conductanceSource' in mList:
+            
+            # Checks if new conductanceSource mechanism is available 
+            if hasattr(Neuron.h, "conductanceSource"):
                 self.clamp = Neuron.h.conductanceSource(position, sec=cell_section)
             else:
                 self.clamp = Neuron.h.SEClamp(position, sec=cell_section)
diff --git a/neurodamus/stimulus_manager.py b/neurodamus/stimulus_manager.py
index b508fd01..8b147b7e 100644
--- a/neurodamus/stimulus_manager.py
+++ b/neurodamus/stimulus_manager.py
@@ -733,17 +733,8 @@ def __init__(self, target, stim_info: dict, cell_manager):
                 if not sc.exists():
                     continue
 
-                # Checks if new conductanceSource mechanism is available
-                mt = Nd.h.MechanismType(1)
-                mname = Nd.h.ref('')
-                mList = []
-                for i in range(mt.count()):
-                    mt.select(i)
-                    mt.selected(mname)
-                    mList.append(mname[0])
-
                 # If conductanceSource not available, insert standard SEClamp
-                if 'conductanceSource' in mList:
+                if hasattr(Nd.h, "conductanceSource"):              
                     seclamp = Nd.h.conductanceSource(tpoint_list.x[sec_id], sec=sc.sec)
                 else:
                     # create single electrode voltage clamp at location