diff --git a/compiler/rustc_codegen_ssa/src/mir/operand.rs b/compiler/rustc_codegen_ssa/src/mir/operand.rs
index c53dd38a3af5e..22b8272684d36 100644
--- a/compiler/rustc_codegen_ssa/src/mir/operand.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/operand.rs
@@ -227,10 +227,11 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
             BackendRepr::ScalarPair {
                 a: a @ abi::Scalar::Initialized { .. },
                 b: b @ abi::Scalar::Initialized { .. },
-                b_offset,
+                b_offset: local_b_offset,
             } => {
                 let (a_size, b_size) = (a.size(bx), b.size(bx));
-                assert!(b_offset.bytes() > 0);
+                let alloc_b_offset = offset + local_b_offset;
+                assert!(alloc_b_offset.bytes() > 0);
                 let a_val = read_scalar(
                     offset,
                     a_size,
@@ -238,7 +239,7 @@ impl<'a, 'tcx, V: CodegenObject> OperandRef<'tcx, V> {
                     bx.scalar_pair_element_backend_type(layout, 0, true),
                 );
                 let b_val = read_scalar(
-                    b_offset,
+                    alloc_b_offset,
                     b_size,
                     b,
                     bx.scalar_pair_element_backend_type(layout, 1, true),
diff --git a/tests/codegen-llvm/const-array-of-pairs.rs b/tests/codegen-llvm/const-array-of-pairs.rs
new file mode 100644
index 0000000000000..8c5f71673cc70
--- /dev/null
+++ b/tests/codegen-llvm/const-array-of-pairs.rs
@@ -0,0 +1,17 @@
+//@ compile-flags: -O -C no-prepopulate-passes
+
+#![crate_type = "lib"]
+
+// Regression test for https://github.com/rust-lang/rust/issues/159116
+// where a change had started reading at the wrong offset into a const
+// when the sub-object had BackendRepr::ScalarPair
+
+const PAIRS: [(u16, u16); 3] = [(1, 2), (3, 4), (5, 6)];
+
+// CHECK-LABEL: @read_not_first_pair
+#[no_mangle]
+pub fn read_not_first_pair() -> (u16, u16) {
+    // CHECK: start:
+    // CHECK-NEXT: ret { i16, i16 } { i16 3, i16 4 }
+    PAIRS[1]
+}