diff --git a/llarp/iwp_link.cpp b/llarp/iwp_link.cpp
index 20d4a8573..0cf78f160 100644
--- a/llarp/iwp_link.cpp
+++ b/llarp/iwp_link.cpp
@@ -580,7 +580,7 @@ namespace iwp
     process(uint8_t *buf, size_t sz)
     {
       frame_header hdr(buf);
-      if(hdr.flags() | eSessionInvalidated)
+      if(hdr.flags() & eSessionInvalidated)
       {
         rxflags |= eSessionInvalidated;
       }