diff --git a/libsqlite3-sys/bindgen-bindings/bindgen_3.14.0.rs b/libsqlite3-sys/bindgen-bindings/bindgen_3.14.0.rs
index 5ab8cde..cf8edc6 100644
--- a/libsqlite3-sys/bindgen-bindings/bindgen_3.14.0.rs
+++ b/libsqlite3-sys/bindgen-bindings/bindgen_3.14.0.rs
@@ -6,7 +6,7 @@ extern "C" {
             unsafe extern "C" fn(
                 db: *mut sqlite3,
                 pzErrMsg: *mut *const ::std::os::raw::c_char,
-                pThunk: *mut sqlite3_api_routines,
+                pThunk: *const sqlite3_api_routines,
             ) -> ::std::os::raw::c_int,
         >,
     ) -> ::std::os::raw::c_int;
diff --git a/libsqlite3-sys/build.rs b/libsqlite3-sys/build.rs
index f6b4bb6..a592bb8 100644
--- a/libsqlite3-sys/build.rs
+++ b/libsqlite3-sys/build.rs
@@ -529,7 +529,7 @@ mod bindings {
     pub fn sqlite3_auto_extension(
         xEntryPoint: ::std::option::Option<unsafe extern "C" fn(db: *mut sqlite3,
          pzErrMsg: *mut *const ::std::os::raw::c_char,
-         pThunk: *mut sqlite3_api_routines
+         pThunk: *const sqlite3_api_routines
          ) -> ::std::os::raw::c_int>,
     ) -> ::std::os::raw::c_int;
 }"#,
diff --git a/libsqlite3-sys/sqlcipher/bindgen_bundled_version.rs b/libsqlite3-sys/sqlcipher/bindgen_bundled_version.rs
index a10f728..52d91d7 100644
--- a/libsqlite3-sys/sqlcipher/bindgen_bundled_version.rs
+++ b/libsqlite3-sys/sqlcipher/bindgen_bundled_version.rs
@@ -6,7 +6,7 @@ extern "C" {
             unsafe extern "C" fn(
                 db: *mut sqlite3,
                 pzErrMsg: *mut *const ::std::os::raw::c_char,
-                pThunk: *mut sqlite3_api_routines,
+                pThunk: *const sqlite3_api_routines,
             ) -> ::std::os::raw::c_int,
         >,
     ) -> ::std::os::raw::c_int;
diff --git a/libsqlite3-sys/sqlite3/bindgen_bundled_version.rs b/libsqlite3-sys/sqlite3/bindgen_bundled_version.rs
index aefe39a..7e7d6b3 100644
--- a/libsqlite3-sys/sqlite3/bindgen_bundled_version.rs
+++ b/libsqlite3-sys/sqlite3/bindgen_bundled_version.rs
@@ -6,7 +6,7 @@ extern "C" {
             unsafe extern "C" fn(
                 db: *mut sqlite3,
                 pzErrMsg: *mut *const ::std::os::raw::c_char,
-                pThunk: *mut sqlite3_api_routines,
+                pThunk: *const sqlite3_api_routines,
             ) -> ::std::os::raw::c_int,
         >,
     ) -> ::std::os::raw::c_int;