diff --git a/0177-pingpong-fix-spelling-error.patch b/0177-pingpong-fix-spelling-error.patch
new file mode 100644
index 0000000000000000000000000000000000000000..1c5d1c14be3065e65455967224b4df2c7a57e1cd
--- /dev/null
+++ b/0177-pingpong-fix-spelling-error.patch
@@ -0,0 +1,22 @@
+diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
+index abc6465..905f7cf 100644
+--- a/src/core/tcp_in.c
++++ b/src/core/tcp_in.c
+@@ -2029,7 +2029,7 @@ tcp_receive(struct tcp_pcb *pcb)
+ #endif /* TCP_OOSEQ_BYTES_LIMIT || TCP_OOSEQ_PBUFS_LIMIT */
+ #endif /* TCP_QUEUE_OOSEQ */
+ 
+-#if GAZELLE_TCP_PINGONG_MODE
++#if GAZELLE_TCP_PINGPONG_MODE
+         tcp_exit_pingpong(pcb); /* ooseq */
+ #endif
+         /* We send the ACK packet after we've (potentially) dealt with SACKs,
+@@ -2038,7 +2038,7 @@ tcp_receive(struct tcp_pcb *pcb)
+         tcp_send_empty_ack(pcb);
+       }
+     } else {
+-#if GAZELLE_TCP_PINGONG_MODE
++#if GAZELLE_TCP_PINGPONG_MODE
+       tcp_exit_pingpong(pcb); /* out of window */
+ #endif
+       /* The incoming segment is not within the window. */
diff --git a/lwip.spec b/lwip.spec
index 2fd341f3f1f525d99368fde81b0b52e223b9017f..42f5da2d84861729b7c9c37719425f9209ed4bc3 100644
--- a/lwip.spec
+++ b/lwip.spec
@@ -4,7 +4,7 @@
 Summary: lwip is a small independent implementation of the TCP/IP protocol suite
 Name:    lwip
 Version: 2.2.0
-Release: 65
+Release: 66
 License: BSD
 URL:     http://savannah.nongnu.org/projects/lwip/
 Source0: http://download.savannah.nongnu.org/releases/lwip/%{name}-%{version}.zip
@@ -190,6 +190,7 @@ Patch9174:  0175-fix-IFNAMSIZ-definition-conflict-between-lwip-and-ke.patch
 
 Patch9175:  0176-fix-no-ack-response-when-lcoal-only-receive-but-not-.patch
 Patch9176:  0001-bug-free-sock-when-func-goto-out.patch
+Patch9177:  0177-pingpong-fix-spelling-error.patch
 
 BuildRequires: gcc-c++ dos2unix dpdk-devel
 
@@ -219,6 +220,9 @@ cd %{_builddir}/%{name}-%{version}/src
 %{_libdir}/liblwip.a
 
 %changelog
+* Fri Dec 6 2024 suchangzhi <suchangzhi_yewu@cmss.chinamobile.com> - 2.2.0-66
+- fix pingpong mode spelling error
+
 * Thu Nov  28 2024 hankangkang <hankangkang5@huawei.com> - 2.2.0-65
 - bug: free sock when exit