diff --git a/userspace/libsinsp/threadinfo.cpp b/userspace/libsinsp/threadinfo.cpp
index cfec222b33..74cd7ced1a 100644
--- a/userspace/libsinsp/threadinfo.cpp
+++ b/userspace/libsinsp/threadinfo.cpp
@@ -824,7 +824,9 @@ sinsp_threadinfo* sinsp_threadinfo::get_parent_thread()
 	return m_inspector->get_thread_ref(m_ptid, false).get();
 }
 
+#ifndef _WIN32
 static re2::RE2 pattern(RGX_POD, re2::RE2::POSIX);
+#endif
 
 void sinsp_threadinfo::set_pod_uid()
 {