diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index e8c4054036..3122e0cc28 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -2250,6 +2250,9 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/gtk/eggtrayicon.c
 </set>
 
+<set var="ADVANCED_GTK_HDR" hints="files">
+    src/gtk/eggtrayicon.h
+</set>
 
 <!-- ====================================================================== -->
 <!--                               wxHTML                                   -->
@@ -2607,7 +2610,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
         <if cond="TOOLKIT=='WINCE'">$(ADVANCED_MSW_HDR)</if>
         <if cond="TOOLKIT=='MAC'">$(ADVANCED_MAC_HDR)</if>
         <if cond="TOOLKIT=='MOTIF'">$(ADVANCED_UNIX_HDR)</if>
-        <if cond="TOOLKIT=='GTK'">$(ADVANCED_UNIX_HDR)</if>
+        <if cond="TOOLKIT=='GTK'">$(ADVANCED_GTK_HDR) $(ADVANCED_UNIX_HDR)</if>
         <if cond="TOOLKIT=='X11'">$(ADVANCED_UNIX_HDR)</if>
         <if cond="TOOLKIT=='PM'">$(ADVANCED_OS2_HDR)</if>
     </set>