diff --git a/backends/concrete-cpu/implementation/src/c_api/wop_pbs.rs b/backends/concrete-cpu/implementation/src/c_api/wop_pbs.rs
index 46973ba302..055a949c76 100644
--- a/backends/concrete-cpu/implementation/src/c_api/wop_pbs.rs
+++ b/backends/concrete-cpu/implementation/src/c_api/wop_pbs.rs
@@ -319,10 +319,8 @@ pub unsafe extern "C" fn concrete_cpu_circuit_bootstrap_boolean_vertical_packing
 
         let mut lut_container = slice::from_raw_parts(lut, lut_size * lut_count);
         let mut expanded_luts: Vec<u64> = vec![
-            0_u64,
-            (fpksk_output_polynomial_size * lut_count)
-                .try_into()
-                .unwrap(),
+            0_u64;
+            fpksk_output_polynomial_size * lut_count
         ];
 
         if lut_size < fpksk_output_polynomial_size {