diff --git a/flang/test/Semantics/OpenMP/omp-device-constructs.f90 b/flang/test/Semantics/OpenMP/omp-device-constructs.f90
--- a/flang/test/Semantics/OpenMP/omp-device-constructs.f90
+++ b/flang/test/Semantics/OpenMP/omp-device-constructs.f90
@@ -56,6 +56,19 @@
   enddo
   !$omp end target
 
+  !$omp target thread_limit(4)
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end target
+
+  !ERROR: At most one THREAD_LIMIT clause can appear on the TARGET directive
+  !$omp target thread_limit(4) thread_limit(8)
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end target
+
   !$omp teams num_teams(3) thread_limit(10) default(shared) private(i) shared(a)
   do i = 1, N
      a = 3.14
diff --git a/llvm/include/llvm/Frontend/OpenMP/OMP.td b/llvm/include/llvm/Frontend/OpenMP/OMP.td
--- a/llvm/include/llvm/Frontend/OpenMP/OMP.td
+++ b/llvm/include/llvm/Frontend/OpenMP/OMP.td
@@ -625,6 +625,7 @@
   ];
   let allowedOnceClauses = [
     VersionedClause<OMPC_Device>,
+    VersionedClause<OMPC_ThreadLimit, 51>,
     VersionedClause<OMPC_DefaultMap>,
     VersionedClause<OMPC_NoWait>
   ];