--- coregrind/pub_core_syscall.h.orig
+++ coregrind/pub_core_syscall.h
@@ -93,6 +93,8 @@
 extern SysRes VG_(mk_SysRes_ppc64_linux) ( ULong val, ULong cr0so, UInt flag );
 extern SysRes VG_(mk_SysRes_x86_freebsd) ( UInt val, UInt val2, Bool err);
 extern SysRes VG_(mk_SysRes_amd64_freebsd)( ULong val, ULong val2, Bool err );
+extern SysRes VG_(mk_SysRes_x86_openbsd) ( UInt val, UInt val2, Bool err);
+extern SysRes VG_(mk_SysRes_amd64_openbsd)( ULong val, ULong val2, Bool err );
 extern SysRes VG_(mk_SysRes_arm_linux)   ( Int val );
 extern SysRes VG_(mk_SysRes_arm64_linux) ( Long val );
 extern SysRes VG_(mk_SysRes_x86_darwin)  ( UChar scclass, Bool isErr,
