diff --git a/src/tbf_ul.cpp b/src/tbf_ul.cpp
index 39e4e95..c347885 100644
--- a/src/tbf_ul.cpp
+++ b/src/tbf_ul.cpp
@@ -615,7 +615,7 @@
 	m_window.set_ws(ws);
 }
 
-gprs_rlc_ul_window *gprs_rlcmac_ul_tbf::window()
+gprs_rlc_window *gprs_rlcmac_ul_tbf::window()
 {
 	return &m_window;
 }