diff -up vim-7.4.1848/src/if_perl.xs.p588 vim-7.4.1848/src/if_perl.xs
--- vim-7.4.1848/src/if_perl.xs.p588	2016-05-27 11:42:26.723874031 +0200
+++ vim-7.4.1848/src/if_perl.xs	2016-05-27 11:45:17.411505507 +0200
@@ -49,6 +49,11 @@
 # define __inline__ __inline
 #endif
 
+/* Work around for perl < 5.8.9 */
+#ifndef SvREFCNT_inc_void_NN
+#define SvREFCNT_inc_void_NN SvREFCNT_inc
+#endif
+
 /* Work around for perl < 5.8.7 */
 #ifndef PERLIO_FUNCS_DECL
 #  ifdef PERLIO_FUNCS_CONST