diff --git a/lib/std/zig/AstGen.zig b/lib/std/zig/AstGen.zig
index 1658686acc..0acf9537ff 100644
--- a/lib/std/zig/AstGen.zig
+++ b/lib/std/zig/AstGen.zig
@@ -7693,7 +7693,7 @@ fn switchExpr(
                 payload_sub_scope = switch_scope;
             } else {
                 const capture_name = try astgen.identAsString(ident);
-                try astgen.detectLocalShadowing(&scratch_scope.base, capture_name, ident, ident_slice, .capture);
+                try astgen.detectLocalShadowing(switch_scope, capture_name, ident, ident_slice, .capture);
                 payload_capture_scope = .{
                     .parent = switch_scope,
                     .gen_zir = &scratch_scope,
diff --git a/test/cases/compile_errors/switch_on_error_shadows_case_capture.zig b/test/cases/compile_errors/switch_on_error_shadows_case_capture.zig
new file mode 100644
index 0000000000..d146be55ea
--- /dev/null
+++ b/test/cases/compile_errors/switch_on_error_shadows_case_capture.zig
@@ -0,0 +1,24 @@
+export fn entry1() void {
+    const e: error{Foo}!u32 = error.Foo;
+    e catch |err| switch (err) {
+        error.Foo => |err| {
+            _ = err catch {};
+        },
+    };
+}
+
+export fn entry2() void {
+    const e: error{Foo}!u32 = error.Foo;
+    if (e) {} else |err| switch (err) {
+        error.Foo => |err| {
+            _ = err catch {};
+        },
+    }
+}
+
+// error
+//
+// :4:23: error: redeclaration of capture 'err'
+// :3:14: note: previous declaration here
+// :13:23: error: redeclaration of capture 'err'
+// :12:21: note: previous declaration here