diff --git a/openmp/libomptarget/deviceRTLs/nvptx/src/omptarget-nvptx.cu b/openmp/libomptarget/deviceRTLs/nvptx/src/omptarget-nvptx.cu
--- a/openmp/libomptarget/deviceRTLs/nvptx/src/omptarget-nvptx.cu
+++ b/openmp/libomptarget/deviceRTLs/nvptx/src/omptarget-nvptx.cu
@@ -76,6 +76,7 @@
       omptarget_nvptx_threadPrivateContext->GetTopLevelTaskDescr(threadId);
   nThreads = GetNumberOfWorkersInTeam();
   threadLimit = ThreadLimit;
+  omptarget_nvptx_workFn = 0;
 }
 
 EXTERN void __kmpc_kernel_deinit(int16_t IsOMPRuntimeInitialized) {