diff --git a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
index e71aa4b5fb..0039aa1a61 100644
--- a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
@@ -48,7 +48,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::byte_length_getter)
 
     // 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception.
     if (array_buffer_object->is_shared_array_buffer())
-        return vm.throw_completion<TypeError>(ErrorType::ThisCannotBeSharedArrayBuffer);
+        return vm.throw_completion<TypeError>(ErrorType::SharedArrayBuffer);
 
     // NOTE: These steps are done in byte_length()
     // 4. If IsDetachedBuffer(O) is true, return +0𝔽.
@@ -66,7 +66,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::max_byte_length)
 
     // 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception.
     if (array_buffer_object->is_shared_array_buffer())
-        return vm.throw_completion<TypeError>(ErrorType::ThisCannotBeSharedArrayBuffer);
+        return vm.throw_completion<TypeError>(ErrorType::SharedArrayBuffer);
 
     // 4. If IsDetachedBuffer(O) is true, return +0𝔽.
     if (array_buffer_object->is_detached())
@@ -98,7 +98,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::resizable)
 
     // 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception.
     if (array_buffer_object->is_shared_array_buffer())
-        return vm.throw_completion<TypeError>(ErrorType::ThisCannotBeSharedArrayBuffer);
+        return vm.throw_completion<TypeError>(ErrorType::SharedArrayBuffer);
 
     // 4. If IsFixedLengthArrayBuffer(O) is false, return true; otherwise return false.
     return Value { !array_buffer_object->is_fixed_length() };
@@ -118,7 +118,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::resize)
 
     // 3. If IsSharedArrayBuffer(O) is true, throw a TypeError exception.
     if (array_buffer_object->is_shared_array_buffer())
-        return vm.throw_completion<TypeError>(ErrorType::ThisCannotBeSharedArrayBuffer);
+        return vm.throw_completion<TypeError>(ErrorType::SharedArrayBuffer);
 
     // 4. Let newByteLength be ? ToIndex(newLength).
     auto new_byte_length = TRY(new_length.to_index(vm));
diff --git a/Userland/Libraries/LibJS/Runtime/ErrorTypes.h b/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
index 09fd781905..061ddc981b 100644
--- a/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
+++ b/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
@@ -224,6 +224,7 @@
     M(RestrictedGlobalProperty, "Cannot declare global property '{}'")                                                                  \
     M(ShadowRealmEvaluateAbruptCompletion, "The evaluated script did not complete normally")                                            \
     M(ShadowRealmWrappedValueNonFunctionObject, "Wrapped value must be primitive or a function object, got {}")                         \
+    M(SharedArrayBuffer, "The array buffer object cannot be a SharedArrayBuffer")                                                       \
     M(SpeciesConstructorDidNotCreate, "Species constructor did not create {}")                                                          \
     M(SpeciesConstructorReturned, "Species constructor returned {}")                                                                    \
     M(StringNonGlobalRegExp, "RegExp argument is non-global")                                                                           \
@@ -298,7 +299,6 @@
     M(TemporalUnknownCriticalAnnotation, "Unknown annotation key in critical annotation: '{}'")                                         \
     M(TemporalZonedDateTimeRoundZeroOrNegativeLengthDay, "Cannot round a ZonedDateTime in a calendar or time zone that has zero or "    \
                                                          "negative length days")                                                        \
-    M(ThisCannotBeSharedArrayBuffer, "|this| cannot be a SharedArrayBuffer")                                                            \
     M(ThisHasNotBeenInitialized, "|this| has not been initialized")                                                                     \
     M(ThisIsAlreadyInitialized, "|this| is already initialized")                                                                        \
     M(ToObjectNullOrUndefined, "ToObject on null or undefined")                                                                         \