Index: external/pdfium/UnpackedTarball_pdfium.mk
--- external/pdfium/UnpackedTarball_pdfium.mk.orig
+++ external/pdfium/UnpackedTarball_pdfium.mk
@@ -23,6 +23,8 @@ ifeq ($(OS),WNT)
 pdfium_patches += pdfium-vs2019-arm64_no-__umulh.patch.1
 endif
 
+pdfium_patches += pdfium-openbsd.patch
+
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,pdfium))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,pdfium,$(PDFIUM_TARBALL)))
