1 files changed, 2 insertions, 0 deletions
diff --git a/proto.h b/proto.h
index b96cb8ba9e..a76e001734 100644
--- a/proto.h
+++ b/proto.h
@@ -1549,10 +1549,12 @@ PERL_CALLCONV OP*	Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP* first, OP* last)
 			__attribute__malloc__
 			__attribute__warn_unused_result__;
 
+#ifdef USE_ITHREADS
 PERL_CALLCONV OP*	Perl_newPADOP(pTHX_ I32 type, I32 flags, SV* sv)
 			__attribute__malloc__
 			__attribute__warn_unused_result__;
 
+#endif
 PERL_CALLCONV OP*	Perl_newPMOP(pTHX_ I32 type, I32 flags)
 			__attribute__malloc__
 			__attribute__warn_unused_result__;