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-rw-r--r--src/libsyntax_ext/assert.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax_ext/assert.rs b/src/libsyntax_ext/assert.rs
index 754f04a26e7..fe4d599d824 100644
--- a/src/libsyntax_ext/assert.rs
+++ b/src/libsyntax_ext/assert.rs
@@ -53,6 +53,7 @@ pub fn expand_assert<'cx>(
                 ),
             )).into()
         },
+        delim: MacDelimiter::Parenthesis,
     };
     let if_expr = cx.expr_if(
         sp,