diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
index 4beb2f44159e3..fc8d392e3937a 100644
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -1147,7 +1147,7 @@ def SYCLIntelKernelArgsRestrict : InheritableAttr {
 
 def SYCLIntelNumSimdWorkItems : InheritableAttr {
   let Spellings = [CXX11<"intelfpga","num_simd_work_items">];
-  let Args = [IntArgument<"Number">];
+  let Args = [UnsignedArgument<"Number">];
   let LangOpts = [SYCLIsDevice, SYCLIsHost];
   let Subjects = SubjectList<[Function], ErrorDiag>;
   let Documentation = [SYCLIntelNumSimdWorkItemsAttrDocs];