1 files changed, 2 insertions, 0 deletions
diff --git a/perl.h b/perl.h
index 3dcb14624a..4a14d84438 100644
--- a/perl.h
+++ b/perl.h
@@ -9,6 +9,8 @@
 #ifndef H_PERL
 #define H_PERL 1
 
+#define PL_OP_SLAB_ALLOC
+
 #ifdef PERL_FOR_X2P
 /*
  * This file is being used for x2p stuff.