diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index d4a94d1308..18b89eef78 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -1916,7 +1916,7 @@ pub const Object = struct {
 
                 if (ty.castTag(.@"struct")) |payload| {
                     const struct_obj = payload.data;
-                    if (struct_obj.layout == .Packed) {
+                    if (struct_obj.layout == .Packed and struct_obj.haveFieldTypes()) {
                         const info = struct_obj.backing_int_ty.intInfo(target);
                         const dwarf_encoding: c_uint = switch (info.signedness) {
                             .signed => DW.ATE.signed,
diff --git a/test/behavior.zig b/test/behavior.zig
index 2f5d752087..442b27c09f 100644
--- a/test/behavior.zig
+++ b/test/behavior.zig
@@ -109,6 +109,7 @@ test {
     _ = @import("behavior/bugs/13128.zig");
     _ = @import("behavior/bugs/13164.zig");
     _ = @import("behavior/bugs/13171.zig");
+    _ = @import("behavior/bugs/13159.zig");
     _ = @import("behavior/byteswap.zig");
     _ = @import("behavior/byval_arg_var.zig");
     _ = @import("behavior/call.zig");
diff --git a/test/behavior/bugs/13159.zig b/test/behavior/bugs/13159.zig
new file mode 100644
index 0000000000..6119c498a9
--- /dev/null
+++ b/test/behavior/bugs/13159.zig
@@ -0,0 +1,14 @@
+const std = @import("std");
+const expect = std.testing.expect;
+
+const Bar = packed struct {
+    const Baz = enum {
+        fizz,
+        buzz,
+    };
+};
+
+test {
+    var foo = Bar.Baz.fizz;
+    try expect(foo == .fizz);
+}