diff --git a/src/core/iomgr/exec_ctx.h b/src/core/iomgr/exec_ctx.h
index ea09188c8f3..8a2e5d5f6a2 100644
--- a/src/core/iomgr/exec_ctx.h
+++ b/src/core/iomgr/exec_ctx.h
@@ -70,7 +70,7 @@ struct grpc_exec_ctx {
 #else
 struct grpc_exec_ctx { int unused; };
 #define GRPC_EXEC_CTX_INIT \
-  {}
+  {0}
 #endif
 
 /** Flush any work that has been enqueued onto this grpc_exec_ctx.