diff --git a/e2e_tests/src/lib.rs b/e2e_tests/src/lib.rs
index ac33fad2..82f66bf9 100644
--- a/e2e_tests/src/lib.rs
+++ b/e2e_tests/src/lib.rs
@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 #![deny(
     nonstandard_style,
-    const_err,
     dead_code,
     improper_ctypes,
     non_shorthand_field_patterns,
diff --git a/e2e_tests/tests/mod.rs b/e2e_tests/tests/mod.rs
index bb251b41..1566fe8e 100644
--- a/e2e_tests/tests/mod.rs
+++ b/e2e_tests/tests/mod.rs
@@ -3,7 +3,6 @@
 
 #![deny(
     nonstandard_style,
-    const_err,
     dead_code,
     improper_ctypes,
     non_shorthand_field_patterns,
diff --git a/fuzz/build.rs b/fuzz/build.rs
index 70557d42..337a1f9c 100644
--- a/fuzz/build.rs
+++ b/fuzz/build.rs
@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 #![deny(
     nonstandard_style,
-    const_err,
     dead_code,
     improper_ctypes,
     non_shorthand_field_patterns,
diff --git a/src/bin/main.rs b/src/bin/main.rs
index f16eae11..dcfd83e8 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -11,7 +11,6 @@
 //! [here](https://parallaxsecond.github.io/parsec-book/user_guides/configuration.html)
 #![deny(
     nonstandard_style,
-    const_err,
     dead_code,
     improper_ctypes,
     non_shorthand_field_patterns,
diff --git a/src/lib.rs b/src/lib.rs
index 39ed26ef..99864016 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,6 @@
 //! [Parsec Book](https://parallaxsecond.github.io/parsec-book/index.html).
 #![deny(
     nonstandard_style,
-    const_err,
     dead_code,
     improper_ctypes,
     non_shorthand_field_patterns,