diff --git a/snntorch/_neurons/synaptic.py b/snntorch/_neurons/synaptic.py
index fb30153f..8807a34b 100644
--- a/snntorch/_neurons/synaptic.py
+++ b/snntorch/_neurons/synaptic.py
@@ -216,7 +216,7 @@ def init_synaptic(self):
     def forward(self, input_, syn=None, mem=None):
 
         if not syn == None:
-            self.syn = mem
+            self.syn = syn
 
         if not mem == None:
             self.mem = mem