Avoid duplicate definitions of ROUND_UP_TO_ALIGNMENT_SIZE() macro.
diff --git a/gRPC-C++.podspec b/gRPC-C++.podspec
index 7205941..b34a9a9 100644
--- a/gRPC-C++.podspec
+++ b/gRPC-C++.podspec
@@ -212,6 +212,7 @@
                       'src/cpp/util/string_ref.cc',
                       'src/cpp/util/time_cc.cc',
                       'src/cpp/codegen/codegen_init.cc',
+                      'src/core/lib/gpr/alloc.h',
                       'src/core/lib/gpr/arena.h',
                       'src/core/lib/gpr/env.h',
                       'src/core/lib/gpr/host_port.h',
@@ -503,6 +504,7 @@
                               'src/cpp/server/health/health.pb.h',
                               'src/cpp/server/thread_pool_interface.h',
                               'src/cpp/thread_manager/thread_manager.h',
+                              'src/core/lib/gpr/alloc.h',
                               'src/core/lib/gpr/arena.h',
                               'src/core/lib/gpr/env.h',
                               'src/core/lib/gpr/host_port.h',