diff --git a/core/src/main/java/org/lflang/LinguaFranca.xtext b/core/src/main/java/org/lflang/LinguaFranca.xtext
index 380273a7db..5b1bda9028 100644
--- a/core/src/main/java/org/lflang/LinguaFranca.xtext
+++ b/core/src/main/java/org/lflang/LinguaFranca.xtext
@@ -237,7 +237,6 @@ Instantiation:
     ')' (('at' host=Host ';') | ';'?);
 
 Connection:
-    (attributes+=Attribute)*
     ((leftPorts += VarRef (',' leftPorts += VarRef)*)
     | ( '(' leftPorts += VarRef (',' leftPorts += VarRef)* ')' iterated ?= '+'?))
     ('->' | physical?='~>')