diff --git a/src/gtk.inc b/src/gtk.inc
index a9d75aecc6..f721b4dc66 100644
--- a/src/gtk.inc
+++ b/src/gtk.inc
@@ -43,6 +43,7 @@ LIB_CPP_SRC=\
  common/textfile.cpp \
  common/time.cpp \
  common/timercmn.cpp \
+ common/tbarsmpl.cpp \
  common/utilscmn.cpp \
  common/wincmn.cpp \
  common/framecmn.cpp \