diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
index 35054c42b551b0bf93d9212a91fcdd97c062f976..448a72671c6313dbda823eae035a1ea0ed93a99e 100644
--- a/src/core/lib/iomgr/tcp_windows.c
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -319,6 +319,7 @@ static void win_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
                             ? GRPC_ERROR_NONE
                             : GRPC_WSA_ERROR(info->wsa_error, "WSASend");
     grpc_exec_ctx_sched(exec_ctx, cb, error, NULL);
+    if (allocated) gpr_free(allocated);
     return;
   }