diff --git a/app/vmselect/promql/arch.go b/app/vmselect/promql/arch.go
new file mode 100644
index 000000000..2e21b8674
--- /dev/null
+++ b/app/vmselect/promql/arch.go
@@ -0,0 +1,5 @@
+package promql
+
+import "unsafe"
+
+const maxByteSliceLen = 1<<(31+9*(unsafe.Sizeof(int(0))/8)) - 1
diff --git a/app/vmselect/promql/arch_386.go b/app/vmselect/promql/arch_386.go
deleted file mode 100644
index 1399daa3b..000000000
--- a/app/vmselect/promql/arch_386.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package promql
-
-const maxByteSliceLen = 1<<31 - 1
diff --git a/app/vmselect/promql/arch_amd64.go b/app/vmselect/promql/arch_amd64.go
deleted file mode 100644
index e26cfda4d..000000000
--- a/app/vmselect/promql/arch_amd64.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package promql
-
-const maxByteSliceLen = 1 << 40
diff --git a/app/vmselect/promql/arch_arm.go b/app/vmselect/promql/arch_arm.go
deleted file mode 100644
index 1399daa3b..000000000
--- a/app/vmselect/promql/arch_arm.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package promql
-
-const maxByteSliceLen = 1<<31 - 1