diff --git a/docs/ops.markdown b/docs/ops.markdown
index dbe780b90..75cfbaf72 100644
--- a/docs/ops.markdown
+++ b/docs/ops.markdown
@@ -1521,7 +1521,7 @@ Change the permissions of `$path` to the posix style permissions of `$mode`.
 Returns 0 on success, throws an exception on failure.
 
 ## chown
-* `chown(str $path, int $uid, int $gid --> int)`
+* `chown(str $path, uint $uid, uint $gid --> int)`
 
 Change the owner or group of the path.
 Throws an exception on failure.
diff --git a/src/vm/js/Operations.nqp b/src/vm/js/Operations.nqp
index 668c56403..682ed1c1a 100644
--- a/src/vm/js/Operations.nqp
+++ b/src/vm/js/Operations.nqp
@@ -576,7 +576,7 @@ class QAST::OperationsJS {
     add_simple_op('mkdir', $T_VOID, [$T_STR, $T_INT], :side_effects);
 
     add_simple_op('chmod', $T_VOID, [$T_STR, $T_INT], :side_effects);
-    add_simple_op('chown', $T_VOID, [$T_STR, $T_INT, $T_INT], :side_effects);
+    add_simple_op('chown', $T_VOID, [$T_STR, $T_UINT, $T_UINT], :side_effects);
 
     add_simple_op('getenvhash', $T_OBJ, [], :side_effects);
     add_simple_op('getsignals', $T_OBJ, [], :side_effects, :takes_hll);
diff --git a/src/vm/jvm/QAST/Compiler.nqp b/src/vm/jvm/QAST/Compiler.nqp
index cff6a6fdc..37d33d551 100644
--- a/src/vm/jvm/QAST/Compiler.nqp
+++ b/src/vm/jvm/QAST/Compiler.nqp
@@ -2270,7 +2270,7 @@ QAST::OperationsJAST.map_classlib_core_op('filenofh', $TYPE_OPS, 'filenofh', [$R
 QAST::OperationsJAST.map_classlib_core_op('setbuffersizefh', $TYPE_OPS, 'setbuffersizefh', [$RT_OBJ, $RT_INT], $RT_OBJ, :tc);
 
 QAST::OperationsJAST.map_classlib_core_op('chmod', $TYPE_OPS, 'chmod', [$RT_STR, $RT_INT], $RT_INT, :tc);
-QAST::OperationsJAST.map_classlib_core_op('chown', $TYPE_OPS, 'chown', [$RT_STR, $RT_INT, $RT_INT], $RT_INT, :tc);
+QAST::OperationsJAST.map_classlib_core_op('chown', $TYPE_OPS, 'chown', [$RT_STR, $RT_UINT, $RT_UINT], $RT_INT, :tc);
 QAST::OperationsJAST.map_classlib_core_op('unlink', $TYPE_OPS, 'unlink', [$RT_STR], $RT_INT, :tc);
 QAST::OperationsJAST.map_classlib_core_op('rmdir', $TYPE_OPS, 'rmdir', [$RT_STR], $RT_INT, :tc);
 QAST::OperationsJAST.map_classlib_core_op('cwd', $TYPE_OPS, 'cwd', [], $RT_STR);