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-rw-r--r--src/lwipopts.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lwipopts.h b/src/lwipopts.h
index 20e7437..5ddb269 100644
--- a/src/lwipopts.h
+++ b/src/lwipopts.h
@@ -149,7 +149,7 @@ happening sooner than they should.
#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL
#endif /* TCP_FAST_INTERVAL */
-#ifndef TCP_SLOW_INTERVALs
+#ifndef TCP_SLOW_INTERVAL
/* the coarse grained timeout in milliseconds */
#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL)
#endif /* TCP_SLOW_INTERVAL */