diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 238d176dfae724a968ace9c894d470c9333fc008..247b134938e71ee06e0e57bf61791929b35fc8ba 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <grpc/support/port_platform.h>
+
 #include <limits.h>
 #include <string.h>