1 files changed, 4 insertions, 2 deletions
diff --git a/src/core/lib/gpr/mpscq.h b/src/core/lib/gpr/mpscq.h
index 6b67880d1b..5ded2522bd 100644
--- a/src/core/lib/gpr/mpscq.h
+++ b/src/core/lib/gpr/mpscq.h
@@ -38,9 +38,11 @@ typedef struct gpr_mpscq_node {
 
 // Actual queue type
 typedef struct gpr_mpscq {
-  gpr_atm head;
   // make sure head & tail don't share a cacheline
-  char padding[GPR_CACHELINE_SIZE];
+  union {
+    char padding[GPR_CACHELINE_SIZE];
+    gpr_atm head;
+  };
   gpr_mpscq_node* tail;
   gpr_mpscq_node stub;
 } gpr_mpscq;