diff --git a/libcontainer/nsenter/nsexec.c b/libcontainer/nsenter/nsexec.c
index 3b08c5e3..e227c93f 100644
--- a/libcontainer/nsenter/nsexec.c
+++ b/libcontainer/nsenter/nsexec.c
@@ -50,9 +50,6 @@ enum sync_t {
 #define JUMP_CHILD  0xA0
 #define JUMP_INIT   0xA1
 
-/* JSON buffer. */
-#define JSON_MAX 4096
-
 /* Assume the stack grows down, so arguments should be above it. */
 struct clone_t {
 	/*