diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp
--- a/clang/lib/Sema/SemaType.cpp
+++ b/clang/lib/Sema/SemaType.cpp
@@ -1516,6 +1516,7 @@
     break;
   case DeclSpec::TST_float128:
     if (!S.Context.getTargetInfo().hasFloat128Type() &&
+        !S.getLangOpts().SYCLIsDevice &&
         !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice))
       S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported)
         << "__float128";
diff --git a/clang/test/SemaSYCL/float128.cpp b/clang/test/SemaSYCL/float128.cpp
new file mode 100644
--- /dev/null
+++ b/clang/test/SemaSYCL/float128.cpp
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -triple spir64 -fsycl-is-device -verify -fsyntax-only %s
+// expected-no-diagnostics
+
+void F(__float128);
+
+template <typename Name, typename Func>
+__attribute__((sycl_kernel)) void kernel_single_task(Func kernelFunc) {
+  kernelFunc();
+}
+
+int main() {
+  __float128 A;
+  kernel_single_task<class fake_kernel>([=]() {});
+  return 0;
+}