diff --git a/src/core/Block.pm6 b/src/core/Block.pm6
index abdefaef0c9..430f2cdf47b 100644
--- a/src/core/Block.pm6
+++ b/src/core/Block.pm6
@@ -78,7 +78,7 @@ my class Block { # declared in BOOTSTRAP
     }
 
     # helper method for array slicing
-    method pos(Block:D $self: \list) {
+    method POSITIONS(Block:D $self: \list) {
       nqp::if(
         (nqp::istype(
           (my \n := nqp::getattr(
diff --git a/src/core/WhateverCode.pm6 b/src/core/WhateverCode.pm6
index 30048bba009..74e41effe5e 100644
--- a/src/core/WhateverCode.pm6
+++ b/src/core/WhateverCode.pm6
@@ -1,7 +1,7 @@
 my class WhateverCode is Code {
 
     # helper method for array slicing
-    method pos(WhateverCode:D $self: \list) {
+    method POSITIONS(WhateverCode:D $self: \list) {
       my \signature := nqp::getattr($self,Code,'$!signature');
       my \count := nqp::getattr(signature,Signature,'$!count');
       nqp::if(
diff --git a/src/core/array_slice.pm6 b/src/core/array_slice.pm6
index 623fd4d13d5..f18cd4ee0cd 100644
--- a/src/core/array_slice.pm6
+++ b/src/core/array_slice.pm6
@@ -343,13 +343,13 @@ multi sub postcircumfix:<[ ]>(\SELF, Iterable:D \pos, Bool() :$v!, *%other) is r
 multi sub postcircumfix:<[ ]>(\SELF, Callable:D $block ) is raw {
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
-      SELF[$block.pos(SELF)]
+      SELF[$block.POSITIONS(SELF)]
     )
 }
 multi sub postcircumfix:<[ ]>(\SELF, Callable:D $block, Mu \assignee ) is raw {
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
-      SELF[$block.pos(SELF)] = assignee
+      SELF[$block.POSITIONS(SELF)] = assignee
     )
 }
 multi sub postcircumfix:<[ ]>(\SELF, Callable:D $block, :$BIND!) is raw {
@@ -359,7 +359,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$delete!,*%other)
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'delete', $delete, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'delete', $delete, %other )
       )
@@ -369,7 +369,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$exists!,*%other)
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'exists', $exists, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'exists', $exists, %other )
       )
@@ -379,7 +379,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$kv!,*%other) is r
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'kv', $kv, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'kv', $kv, %other )
       )
@@ -389,7 +389,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$p!,*%other) is ra
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'p', $p, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'p', $p, %other )
       )
@@ -399,7 +399,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$k!,*%other) is ra
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'k', $k, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'k', $k, %other )
       )
@@ -409,7 +409,7 @@ multi sub postcircumfix:<[ ]>(\SELF,Callable:D $block,Bool() :$v!,*%other) is ra
     nqp::stmts(
       (my $*INDEX = 'Effective index'),
       nqp::if(
-        nqp::istype((my $pos := $block.pos(SELF)),Int),
+        nqp::istype((my $pos := $block.POSITIONS(SELF)),Int),
         SLICE_ONE_LIST(  SELF,  $pos, 'v', $v, %other ),
         SLICE_MORE_LIST( SELF, @$pos, 'v', $v, %other )
       )