1 files changed, 2 insertions, 2 deletions
diff --git a/perl.h b/perl.h
index 651f15c6cf..11cac10a00 100644
--- a/perl.h
+++ b/perl.h
@@ -45,8 +45,8 @@
 /* PERL_IMPLICIT_SYS implies PerlMemShared != PerlMem
    so use slab allocator to avoid lots of MUTEX overhead
  */
-#  ifndef PL_SLAB_ALLOC
-#    define PL_SLAB_ALLOC
+#  ifndef PL_OP_SLAB_ALLOC
+#    define PL_OP_SLAB_ALLOC
 #  endif
 #endif