Index: vcl/Library_vclplug_gtk3.mk
--- vcl/Library_vclplug_gtk3.mk.orig
+++ vcl/Library_vclplug_gtk3.mk
@@ -115,10 +115,10 @@ $(eval $(call gb_Library_add_exception_objects,vclplug
     vcl/unx/gtk3/hudawareness \
 ))
 
-ifeq ($(OS),LINUX)
+ifneq (,$(filter LINUX OPENBSD,$(OS)))
 $(eval $(call gb_Library_add_libs,vclplug_gtk3,\
 	-lm \
-	-ldl \
+	$(if $(filter LINUX,$(OS)),-ldl) \
 ))
 endif
 
