1 files changed, 1 insertions, 0 deletions
diff --git a/proto.h b/proto.h
index d81633203d..839cdbf14e 100644
--- a/proto.h
+++ b/proto.h
@@ -1732,6 +1732,7 @@ PERL_CALLCONV PERL_SI*	Perl_si_dup(pTHX_ PERL_SI* si, CLONE_PARAMS* param);
 PERL_CALLCONV ANY*	Perl_ss_dup(pTHX_ PerlInterpreter* proto_perl, CLONE_PARAMS* param);
 PERL_CALLCONV void*	Perl_any_dup(pTHX_ void* v, PerlInterpreter* proto_perl);
 PERL_CALLCONV HE*	Perl_he_dup(pTHX_ HE* e, bool shared, CLONE_PARAMS* param);
+PERL_CALLCONV HEK*	Perl_hek_dup(pTHX_ HEK* e, CLONE_PARAMS* param);
 PERL_CALLCONV REGEXP*	Perl_re_dup(pTHX_ REGEXP* r, CLONE_PARAMS* param);
 PERL_CALLCONV PerlIO*	Perl_fp_dup(pTHX_ PerlIO* fp, char type, CLONE_PARAMS* param);
 PERL_CALLCONV DIR*	Perl_dirp_dup(pTHX_ DIR* dp);