diff --git a/migen/bus/asmibus.py b/migen/bus/asmibus.py
index 712e7f869..4002f99e4 100644
--- a/migen/bus/asmibus.py
+++ b/migen/bus/asmibus.py
@@ -79,7 +79,7 @@ class Port:
 		if not self.finalized:
 			raise FinalizeError
 		return self.call \
-			&& (self.tag_call == Constant(self.base + slotn, BV(self.tagbits)))
+			& (self.tag_call == Constant(self.base + slotn, BV(self.tagbits)))
 		
 	def get_fragment(self):
 		if not self.finalized: