diff --git a/subprojects/xsts/xsts/src/main/antlr/XstsDsl.g4 b/subprojects/xsts/xsts/src/main/antlr/XstsDsl.g4
index 02539cea1e..2923b124df 100644
--- a/subprojects/xsts/xsts/src/main/antlr/XstsDsl.g4
+++ b/subprojects/xsts/xsts/src/main/antlr/XstsDsl.g4
@@ -2,7 +2,7 @@ grammar XstsDsl;
 
 xsts:
     typeDeclarations+=typeDeclaration*
-    variableDeclarations+=variableDeclaration (variableDeclarations+=variableDeclaration)*
+    variableDeclarations+=variableDeclaration*
     tran=tranSet
     init=initSet
     env=envSet