diff --git a/src/translate_c.zig b/src/translate_c.zig
index dda2ee8e2e2e..9688f49053ef 100644
--- a/src/translate_c.zig
+++ b/src/translate_c.zig
@@ -1257,7 +1257,12 @@ fn transConvertVectorExpr(
     const src_vector_ty = @as(*const clang.VectorType, @ptrCast(src_type));
     const src_element_qt = src_vector_ty.getElementType();
 
-    const src_expr_node = try transExpr(c, &block_scope.base, src_expr, .used);
+    const src_expr_var_name = try block_scope.makeMangledName(c, "tmp");
+    try block_scope.statements.append(try Tag.var_simple.create(c.arena, .{
+        .name = src_expr_var_name,
+        .init = try transExpr(c, &block_scope.base, src_expr, .used),
+    }));
+    const src_expr_var_node = try Tag.identifier.create(c.arena, src_expr_var_name);
 
     const dst_qt = expr.getTypeSourceInfo_getType();
     const dst_type_node = try transQualType(c, &block_scope.base, dst_qt, base_stmt.getBeginLoc());
@@ -1273,7 +1278,7 @@ fn transConvertVectorExpr(
     while (i < num_elements) : (i += 1) {
         const mangled_name = try block_scope.makeMangledName(c, "tmp");
         const value = try Tag.array_access.create(c.arena, .{
-            .lhs = src_expr_node,
+            .lhs = src_expr_var_node,
             .rhs = try transCreateNodeNumber(c, i, .int),
         });
         const tmp_decl_node = try Tag.var_simple.create(c.arena, .{
@@ -1284,7 +1289,7 @@ fn transConvertVectorExpr(
     }
 
     const init_list = try c.arena.alloc(Node, num_elements);
-    for (init_list, 0..) |*init, init_index| {
+    for (init_list, block_scope.statements.items.len - num_elements..) |*init, init_index| {
         const tmp_decl = block_scope.statements.items[init_index];
         const name = tmp_decl.castTag(.var_simple).?.data.name;
         init.* = try Tag.identifier.create(c.arena, name);
diff --git a/test/cases/translate_c/builtin_convertvector.c b/test/cases/translate_c/builtin_convertvector.c
new file mode 100644
index 000000000000..e7cb5d153988
--- /dev/null
+++ b/test/cases/translate_c/builtin_convertvector.c
@@ -0,0 +1,30 @@
+typedef int i32x2 __attribute__((__vector_size__(8)));
+typedef float f32x2 __attribute__((__vector_size__(8)));
+
+f32x2 cast_function(i32x2 x) {
+  return (f32x2) __builtin_convertvector((i32x2) { x[0], x[1] }, f32x2);
+}
+
+// translate-c
+// c_frontend=clang
+//
+// pub export fn cast_function(arg_x: i32x2) f32x2 {
+//     var x = arg_x;
+//     _ = &x;
+//     return blk: {
+//         const tmp = blk_1: {
+//             const tmp_2 = x[@as(c_uint, @intCast(@as(c_int, 0)))];
+//             const tmp_3 = x[@as(c_uint, @intCast(@as(c_int, 1)))];
+//             break :blk_1 i32x2{
+//                 tmp_2,
+//                 tmp_3,
+//             };
+//         };
+//         const tmp_1 = @as(f32, @floatFromInt(tmp[0]));
+//         const tmp_2 = @as(f32, @floatFromInt(tmp[1]));
+//         break :blk f32x2{
+//             tmp_1,
+//             tmp_2,
+//         };
+//     };
+// }