diff --git a/tap/tlstapper/bpf/golang_uprobes.c b/tap/tlstapper/bpf/golang_uprobes.c
index 3d99600e3..de259f300 100644
--- a/tap/tlstapper/bpf/golang_uprobes.c
+++ b/tap/tlstapper/bpf/golang_uprobes.c
@@ -85,8 +85,8 @@ static __always_inline int golang_crypto_tls_read_uprobe(struct pt_regs *ctx) {
     // ctx->rsi is common between golang_crypto_tls_write_uprobe and golang_crypto_tls_read_uprobe
     b->conn_addr = ctx->rsi; // go.itab.*net.TCPConn,net.Conn address
     b->is_request = false;
-    b->len = CRYPTO_TLS_READ_LEN;
-    b->cap = CRYPTO_TLS_READ_LEN; // no cap info
+    b->len = ctx->rcx;
+    b->cap = ctx->rcx; // no cap info
 
     void* stack_addr = (void*)ctx->rsp;
     __u64 data_p;
diff --git a/tap/tlstapper/tlstapper_bpfeb.o b/tap/tlstapper/tlstapper_bpfeb.o
index 0af714819..0e29b030a 100644
Binary files a/tap/tlstapper/tlstapper_bpfeb.o and b/tap/tlstapper/tlstapper_bpfeb.o differ
diff --git a/tap/tlstapper/tlstapper_bpfel.o b/tap/tlstapper/tlstapper_bpfel.o
index fca6f7836..c2fc1d6d7 100644
Binary files a/tap/tlstapper/tlstapper_bpfel.o and b/tap/tlstapper/tlstapper_bpfel.o differ