diff --git a/halo2_frontend/src/circuit.rs b/halo2_frontend/src/circuit.rs
index ab817cfef5..cba243330f 100644
--- a/halo2_frontend/src/circuit.rs
+++ b/halo2_frontend/src/circuit.rs
@@ -108,8 +108,8 @@ pub fn compile_circuit<F: Field, ConcreteCircuit: Circuit<F>>(
         cs.constants.clone(),
     )?;
 
-    // Consider that "cs.num_fixed_columns" already increased by 
-    // "selector_polys"(number of `fixed` columns converted from `selector`s) 
+    // Consider that "cs.num_fixed_columns" already increased by
+    // "selector_polys"(number of `fixed` columns converted from `selector`s)
     // in "compile_circuit_cs" step
     let mut fixed = batch_invert_assigned(assembly.fixed);
     let selector_polys = selectors_to_fixed.convert(assembly.selectors);