diff --git a/vcl/Library_vclplug_gtk3.mk b/vcl/Library_vclplug_gtk3.mk
index 83fb8306468d..587d69376500 100644
--- a/vcl/Library_vclplug_gtk3.mk
+++ b/vcl/Library_vclplug_gtk3.mk
@@ -32,7 +32,6 @@ $(eval $(call gb_Library_set_include,vclplug_gtk3,\
     -I$(SRCDIR)/vcl/inc \
     -I$(SRCDIR)/vcl/inc/pch \
     -I$(SRCDIR)/solenv/inc \
-    -I$(OUTDIR)/inc/offuh \
     -I$(OUTDIR)/inc \
 ))
 
@@ -47,6 +46,11 @@ $(eval $(call gb_Library_set_defs,vclplug_gtk3,\
     -DVERSION=\"$(UPD)$(LAST_MINOR)\" \
 ))
 
+$(eval $(call gb_Library_add_api,vclplug_gtk3,\
+    offapi \
+    udkapi \
+))
+
 ifneq ($(ENABLE_DBUS),)
 $(eval $(call gb_Library_set_include,vclplug_gtk3,\
 	$$(INCLUDE) \