diff --git a/openmp/libomptarget/deviceRTLs/common/src/reduction.cu b/openmp/libomptarget/deviceRTLs/common/src/reduction.cu
--- a/openmp/libomptarget/deviceRTLs/common/src/reduction.cu
+++ b/openmp/libomptarget/deviceRTLs/common/src/reduction.cu
@@ -230,7 +230,7 @@
                           : /*Master thread only*/ 1;
   uint32_t TeamId = GetBlockIdInKernel();
   uint32_t NumTeams = GetNumberOfBlocksInKernel();
-  SHARED volatile bool IsLastTeam;
+  static SHARED volatile bool IsLastTeam;
 
   // Team masters of all teams write to the scratchpad.
   if (ThreadId == 0) {
@@ -423,8 +423,8 @@
                          : /*Master thread only*/ 1;
   uint32_t TeamId = GetBlockIdInKernel();
   uint32_t NumTeams = GetNumberOfBlocksInKernel();
-  SHARED unsigned Bound;
-  SHARED unsigned ChunkTeamCount;
+  static SHARED unsigned Bound;
+  static SHARED unsigned ChunkTeamCount;
 
   // Block progress for teams greater than the current upper
   // limit. We always only allow a number of teams less or equal