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-rw-r--r--os/various/lwip_bindings/static_lwipopts.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/os/various/lwip_bindings/static_lwipopts.h b/os/various/lwip_bindings/static_lwipopts.h
index 3f3e9b3da..a59d4b41a 100644
--- a/os/various/lwip_bindings/static_lwipopts.h
+++ b/os/various/lwip_bindings/static_lwipopts.h
@@ -31,7 +31,7 @@
#define LWIP_TCPIP_CORE_LOCKING 1
#define LWIP_TCPIP_CORE_LOCKING_INPUT 0
-#define LWIP_COMPAT_MUTEX_ALLOWED
+#define LWIP_COMPAT_MUTEX_ALLOWED 1
#define SYS_LIGHTWEIGHT_PROT 0