diff --git a/integration_tests/CMakeLists.txt b/integration_tests/CMakeLists.txt
index 9b4516c26d..67ee3b0621 100644
--- a/integration_tests/CMakeLists.txt
+++ b/integration_tests/CMakeLists.txt
@@ -477,6 +477,7 @@ RUN(NAME structs_19          LABELS cpython llvm c
 RUN(NAME structs_20          LABELS cpython llvm c
     EXTRAFILES structs_20b.c)
 RUN(NAME structs_21          LABELS cpython llvm c)
+RUN(NAME structs_22          LABELS cpython llvm c)
 RUN(NAME sizeof_01           LABELS llvm c
         EXTRAFILES sizeof_01b.c)
 RUN(NAME sizeof_02           LABELS cpython llvm c)
diff --git a/integration_tests/structs_22.py b/integration_tests/structs_22.py
new file mode 100644
index 0000000000..7329d4c26b
--- /dev/null
+++ b/integration_tests/structs_22.py
@@ -0,0 +1,43 @@
+from lpython import dataclass, i32, f64, u64
+from numpy import array
+
+@dataclass
+class Foo:
+    x: i32
+    y: i32
+
+@dataclass
+class Foo2:
+    p: f64
+    q: i32
+    r: u64
+
+def main0() -> None:
+    foos: Foo[2] = array([Foo(1, 2), Foo(3, 4)])
+    print(foos[0].x, foos[0].y, foos[1].x, foos[1].y)
+
+    assert foos[0].x == 1
+    assert foos[0].y == 2
+    assert foos[1].x == 3
+    assert foos[1].y == 4
+
+def main1() -> None:
+    foos2: Foo2[3] = array([Foo2(-2.3, 42, u64(3)), Foo2(45.5, -3, u64(10001)), Foo2(1.0, -101, u64(100))])
+    i: i32
+    for i in range(3):
+        print(foos2[i].p, foos2[i].q, foos2[i].r)
+
+    eps: f64
+    eps = 1e-12
+    assert abs(foos2[0].p - (-2.3)) <= eps
+    assert foos2[0].q == 42
+    assert foos2[0].r == u64(3)
+    assert abs(foos2[1].p - (45.5)) <= eps
+    assert foos2[1].q == -3
+    assert foos2[1].r == u64(10001)
+    assert abs(foos2[2].p - (1.0)) <= eps
+    assert foos2[2].q == -101
+    assert foos2[2].r == u64(100)
+
+main0()
+main1()
diff --git a/src/libasr/codegen/asr_to_c.cpp b/src/libasr/codegen/asr_to_c.cpp
index 07f34bb157..1035040ac4 100644
--- a/src/libasr/codegen/asr_to_c.cpp
+++ b/src/libasr/codegen/asr_to_c.cpp
@@ -1133,10 +1133,10 @@ R"(
         }
         for (size_t i=0; i<x.n_values; i++) {
             this->visit_expr(*x.m_values[i]);
-            if( ASRUtils::is_array(ASRUtils::expr_type(x.m_values[i])) ) {
+            ASR::ttype_t* value_type = ASRUtils::expr_type(x.m_values[i]);
+            if( ASRUtils::is_array(value_type) ) {
                 src += "->data";
             }
-            ASR::ttype_t* value_type = ASRUtils::expr_type(x.m_values[i]);
             if (value_type->type == ASR::ttypeType::List ||
                 value_type->type == ASR::ttypeType::Tuple) {
                 tmp_gen += "\"";
diff --git a/src/libasr/codegen/c_utils.h b/src/libasr/codegen/c_utils.h
index 3fcf47e797..050ba26dc2 100644
--- a/src/libasr/codegen/c_utils.h
+++ b/src/libasr/codegen/c_utils.h
@@ -471,6 +471,22 @@ class CCPPDSUtils {
                         default: { throw LCompilersException("Integer kind not supported"); }
                     }
                 }
+                case ASR::ttypeType::UnsignedInteger: {
+                    ASR::UnsignedInteger_t *ui = (ASR::UnsignedInteger_t*)t;
+                    switch (ui->m_kind) {
+                        case 1: { return "%u"; }
+                        case 2: { return "%u"; }
+                        case 4: { return "%u"; }
+                        case 8: {
+                            if (platform == Platform::Linux) {
+                                return "%lu";
+                            } else {
+                                return "%llu";
+                            }
+                        }
+                        default: { throw LCompilersException("Unsigned Integer kind not supported"); }
+                    }
+                }
                 case ASR::ttypeType::Real: {
                     ASR::Real_t *r = (ASR::Real_t*)t;
                     switch (r->m_kind) {
diff --git a/src/libasr/pass/pass_manager.h b/src/libasr/pass/pass_manager.h
index b6a4ca0f3f..d77d4bf794 100644
--- a/src/libasr/pass/pass_manager.h
+++ b/src/libasr/pass/pass_manager.h
@@ -189,8 +189,8 @@ namespace LCompilers {
                 "nested_vars",
                 "global_stmts",
                 "init_expr",
-                "class_constructor",
                 "implied_do_loops",
+                "class_constructor",
                 "pass_list_expr",
                 "arr_slice",
                 "subroutine_from_function",
@@ -212,8 +212,8 @@ namespace LCompilers {
             _with_optimization_passes = {
                 "global_stmts",
                 "init_expr",
-                "class_constructor",
                 "implied_do_loops",
+                "class_constructor",
                 "pass_array_by_data",
                 "arr_slice",
                 "subroutine_from_function",