Index: vcl/Library_vclplug_qt5.mk
--- vcl/Library_vclplug_qt5.mk.orig
+++ vcl/Library_vclplug_qt5.mk
@@ -142,10 +142,10 @@ $(eval $(call gb_Library_add_exception_objects,vclplug
     ) \
 ))
 
-ifeq ($(OS),LINUX)
+ifneq (,$(filter LINUX OPENBSD,$(OS)))
 $(eval $(call gb_Library_add_libs,vclplug_qt5,\
 	-lm \
-	-ldl \
+        $(if $(filter LINUX,$(OS)),-ldl) \
 ))
 endif
 
