1 files changed, 8 insertions, 0 deletions
diff --git a/proto.h b/proto.h
index 294d62b68c..2050389066 100644
--- a/proto.h
+++ b/proto.h
@@ -386,9 +386,17 @@ PERL_CALLCONV bool	Perl_do_close(pTHX_ GV* gv, bool not_implicit)
 PERL_CALLCONV bool	Perl_do_eof(pTHX_ GV* gv)
 			__attribute__nonnull__(pTHX_1);
 
+
+#ifdef PERL_DEFAULT_DO_EXEC3_IMPLEMENTATION
 /* PERL_CALLCONV bool	Perl_do_exec(pTHX_ const char* cmd)
 			__attribute__nonnull__(pTHX_1); */
 
+#else
+PERL_CALLCONV bool	Perl_do_exec(pTHX_ const char* cmd)
+			__attribute__nonnull__(pTHX_1);
+
+#endif
+
 #if defined(WIN32) || defined(__SYMBIAN32__)
 PERL_CALLCONV int	Perl_do_aspawn(pTHX_ SV* really, SV** mark, SV** sp)
 			__attribute__nonnull__(pTHX_1)