diff --git a/flang/test/Semantics/omp-clause-validity01.f90 b/flang/test/Semantics/omp-clause-validity01.f90
--- a/flang/test/Semantics/omp-clause-validity01.f90
+++ b/flang/test/Semantics/omp-clause-validity01.f90
@@ -396,6 +396,9 @@
   !$omp taskyield
   !$omp barrier
   !$omp taskwait
+  !$omp taskwait depend(source)
+  !ERROR: Internal: no symbol found for 'i'
+  !$omp taskwait depend(sink:i-1)
   ! !$omp target enter data map(to:arrayA) map(alloc:arrayB)
   ! !$omp target update from(arrayA) to(arrayB)
   ! !$omp target exit data map(from:arrayA) map(delete:arrayB)
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
@@ -312,7 +312,11 @@
 }
 def OMP_TaskYield : Directive<"taskyield"> {}
 def OMP_Barrier : Directive<"barrier"> {}
-def OMP_TaskWait : Directive<"taskwait"> {}
+def OMP_TaskWait : Directive<"taskwait"> {
+  let allowedClauses = [
+    VersionedClause<OMPC_Depend, 50>
+  ];
+}
 def OMP_TaskGroup : Directive<"taskgroup"> {
   let allowedClauses = [
     VersionedClause<OMPC_TaskReduction>,